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11125621 = 1319311453
BaseRepresentation
bin101010011100…
…001101110101
3202221020111001
4222130031311
510322004441
61034243301
7163365133
oct52341565
922836431
1011125621
116309931
123886531
1323c7010
141698753
15e9b731
hexa9c375

11125621 has 16 divisors (see below), whose sum is σ = 13027840. Its totient is φ = 9408960.

The previous prime is 11125619. The next prime is 11125627. The reversal of 11125621 is 12652111.

11125621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a 3-Lehmer number, since φ(11125621) divides (11125621-1)3.

It is a cyclic number.

It is not a de Polignac number, because 11125621 - 21 = 11125619 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11125627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6931 + ... + 8383.

It is an arithmetic number, because the mean of its divisors is an integer number (814240).

Almost surely, 211125621 is an apocalyptic number.

It is an amenable number.

11125621 is a deficient number, since it is larger than the sum of its proper divisors (1902219).

11125621 is a wasteful number, since it uses less digits than its factorization.

11125621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516.

The product of its digits is 120, while the sum is 19.

The square root of 11125621 is about 3335.5091065683. The cubic root of 11125621 is about 223.2414084199.

Adding to 11125621 its reverse (12652111), we get a palindrome (23777732).

It can be divided in two parts, 11 and 125621, that multiplied together give a palindrome (1381831).

The spelling of 11125621 in words is "eleven million, one hundred twenty-five thousand, six hundred twenty-one".

Divisors: 1 13 19 31 247 403 589 1453 7657 18889 27607 45043 358891 585559 855817 11125621