121172625 has 128 divisors (see below), whose sum is σ = 268369920. Its totient is φ = 52747200.

The previous prime is 121172609. The next prime is 121172659. The reversal of 121172625 is 526271121.

121172625 is a `hidden beast` number, since 1 + 21 + 17 + 2 + 625 = 666.

It is not a de Polignac number, because 121172625 - 2⁴ = 121172609 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 543264 + ... + 543486.

It is an arithmetic number, because the mean of its divisors is an integer number (2096640).

Almost surely, 2^121172625 is an apocalyptic number.

121172625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121172625 is an abundant number, since it is smaller than the sum of its proper divisors (147197295).

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

121172625 is a wasteful number, since it uses less digits than its factorization.

121172625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 261 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 121172625 is about 11007.8437943132. The cubic root of 121172625 is about 494.8438442236.

The spelling of 121172625 in words is "one hundred twenty-one million, one hundred seventy-two thousand, six hundred twenty-five".