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12131413 = 710117159
BaseRepresentation
bin101110010001…
…110001010101
3211211100011121
4232101301111
511101201123
61112003541
7205054360
oct56216125
924740147
1012131413
116936568
1240905b1
132689a68
14187b0d7
1510e975d
hexb91c55

12131413 has 8 divisors (see below), whose sum is σ = 14002560. Its totient is φ = 10294800.

The previous prime is 12131393. The next prime is 12131417. The reversal of 12131413 is 31413121.

12131413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12131413 - 29 = 12130901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131417) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7873 + ... + 9286.

It is an arithmetic number, because the mean of its divisors is an integer number (1750320).

Almost surely, 212131413 is an apocalyptic number.

It is an amenable number.

12131413 is a deficient number, since it is larger than the sum of its proper divisors (1871147).

12131413 is a wasteful number, since it uses less digits than its factorization.

12131413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17267.

The product of its digits is 72, while the sum is 16.

The square root of 12131413 is about 3483.0178007010. The cubic root of 12131413 is about 229.7755403127.

Adding to 12131413 its reverse (31413121), we get a palindrome (43544534).

It can be divided in two parts, 12131 and 413, that added together give a square (12544 = 1122).

The spelling of 12131413 in words is "twelve million, one hundred thirty-one thousand, four hundred thirteen".

Divisors: 1 7 101 707 17159 120113 1733059 12131413