121604751 has 24 divisors (see below), whose sum is σ = 178470864. Its totient is φ = 79779840.

The previous prime is 121604741. The next prime is 121604759. The reversal of 121604751 is 157406121.

It is a happy number.

121604751 is a `hidden beast` number, since 1 + 2 + 1 + 604 + 7 + 51 = 666.

It is not a de Polignac number, because 121604751 - 2⁵ = 121604719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121604759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189391 + ... + 190031.

It is an arithmetic number, because the mean of its divisors is an integer number (7436286).

Almost surely, 2^121604751 is an apocalyptic number.

121604751 is a deficient number, since it is larger than the sum of its proper divisors (56866113).

121604751 is a wasteful number, since it uses less digits than its factorization.

121604751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951 (or 948 counting only the distinct ones).

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

The square root of 121604751 is about 11027.4544206721. The cubic root of 121604751 is about 495.4313839716.

The spelling of 121604751 in words is "one hundred twenty-one million, six hundred four thousand, seven hundred fifty-one".