1115625621 has 32 divisors (see below), whose sum is σ = 1719688320. Its totient is φ = 636876800.

The previous prime is 1115625617. The next prime is 1115625647. The reversal of 1115625621 is 1265265111.

It is a cyclic number.

It is not a de Polignac number, because 1115625621 - 2² = 1115625617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115625611) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25021 + ... + 53453.

It is an arithmetic number, because the mean of its divisors is an integer number (53740260).

Almost surely, 2^1115625621 is an apocalyptic number.

1115625621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1115625621 is a deficient number, since it is larger than the sum of its proper divisors (604062699).

1115625621 is a wasteful number, since it uses less digits than its factorization.

1115625621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28517.

The product of its digits is 3600, while the sum is 30.

The square root of 1115625621 is about 33400.9823358535. The cubic root of 1115625621 is about 1037.1450362792.

The spelling of 1115625621 in words is "one billion, one hundred fifteen million, six hundred twenty-five thousand, six hundred twenty-one".