115621765 has 16 divisors (see below), whose sum is σ = 159638400. Its totient is φ = 78747840.

The previous prime is 115621721. The next prime is 115621771. The reversal of 115621765 is 567126511.

It is not a de Polignac number, because 115621765 - 2¹¹ = 115619717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115621765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5871 + ... + 16300.

It is an arithmetic number, because the mean of its divisors is an integer number (9977400).

Almost surely, 2^115621765 is an apocalyptic number.

It is an amenable number.

115621765 is a deficient number, since it is larger than the sum of its proper divisors (44016635).

115621765 is a wasteful number, since it uses less digits than its factorization.

115621765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22332.

The product of its digits is 12600, while the sum is 34.

The square root of 115621765 is about 10752.7561583066. The cubic root of 115621765 is about 487.1692466071.

The spelling of 115621765 in words is "one hundred fifteen million, six hundred twenty-one thousand, seven hundred sixty-five".