121604651 has 16 divisors (see below), whose sum is σ = 143278080. Its totient is φ = 101049120.

The previous prime is 121604597. The next prime is 121604653. The reversal of 121604651 is 156406121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121604651 is a prime.

It is a super-2 number, since 2×121604651² = 29575382289663602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121604651.

It is not an unprimeable number, because it can be changed into a prime (121604653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34166 + ... + 37556.

It is an arithmetic number, because the mean of its divisors is an integer number (8954880).

Almost surely, 2^121604651 is an apocalyptic number.

121604651 is a deficient number, since it is larger than the sum of its proper divisors (21673429).

121604651 is a wasteful number, since it uses less digits than its factorization.

121604651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 121604651 is about 11027.4498865332. The cubic root of 121604651 is about 495.4312481678.

The spelling of 121604651 in words is "one hundred twenty-one million, six hundred four thousand, six hundred fifty-one".