121657275 has 24 divisors (see below), whose sum is σ = 223490160. Its totient is φ = 64883520.

The previous prime is 121657271. The next prime is 121657279. The reversal of 121657275 is 572756121.

121657275 is a `hidden beast` number, since 1 + 2 + 16 + 572 + 75 = 666.

It is an interprime number because it is at equal distance from previous prime (121657271) and next prime (121657279).

It is not a de Polignac number, because 121657275 - 2² = 121657271 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (121657271) 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, 89442 + ... + 90791.

It is an arithmetic number, because the mean of its divisors is an integer number (9312090).

Almost surely, 2^121657275 is an apocalyptic number.

121657275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121657275 is a deficient number, since it is larger than the sum of its proper divisors (101832885).

121657275 is a wasteful number, since it uses less digits than its factorization.

121657275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180252 (or 180241 counting only the distinct ones).

The product of its digits is 29400, while the sum is 36.

The square root of 121657275 is about 11029.8356742066. The cubic root of 121657275 is about 495.5027032585.

The spelling of 121657275 in words is "one hundred twenty-one million, six hundred fifty-seven thousand, two hundred seventy-five".