1125621541 has 24 divisors (see below), whose sum is σ = 1351355040. Its totient is φ = 927194400.

The previous prime is 1125621533. The next prime is 1125621547. The reversal of 1125621541 is 1451265211.

It is not a de Polignac number, because 1125621541 - 2³ = 1125621533 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125621547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105471 + ... + 115651.

It is an arithmetic number, because the mean of its divisors is an integer number (56306460).

Almost surely, 2^1125621541 is an apocalyptic number.

1125621541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1125621541 is a deficient number, since it is larger than the sum of its proper divisors (225733499).

1125621541 is a wasteful number, since it uses less digits than its factorization.

1125621541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10257 (or 10234 counting only the distinct ones).

The product of its digits is 2400, while the sum is 28.

The square root of 1125621541 is about 33550.2837692917. The cubic root of 1125621541 is about 1040.2334106903.

Adding to 1125621541 its reverse (1451265211), we get a palindrome (2576886752).

The spelling of 1125621541 in words is "one billion, one hundred twenty-five million, six hundred twenty-one thousand, five hundred forty-one".