115421640 has 32 divisors (see below), whose sum is σ = 346265280. Its totient is φ = 30779072.

The previous prime is 115421639. The next prime is 115421671. The reversal of 115421640 is 46124511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 115421640.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480804 + ... + 481043.

It is an arithmetic number, because the mean of its divisors is an integer number (10820790).

Almost surely, 2^115421640 is an apocalyptic number.

115421640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115421640 is an abundant number, since it is smaller than the sum of its proper divisors (230843640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115421640 is a wasteful number, since it uses less digits than its factorization.

115421640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961861 (or 961857 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 115421640 is about 10743.4463744182. The cubic root of 115421640 is about 486.8880104877. Note that the first 3 decimals are identical.

The spelling of 115421640 in words is "one hundred fifteen million, four hundred twenty-one thousand, six hundred forty".