121560613 has 24 divisors (see below), whose sum is σ = 135184896. Its totient is φ = 109166400.

The previous prime is 121560601. The next prime is 121560653. The reversal of 121560613 is 316065121.

It is not a de Polignac number, because 121560613 - 2²⁵ = 88006181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121560653) 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, 636348 + ... + 636538.

It is an arithmetic number, because the mean of its divisors is an integer number (5632704).

Almost surely, 2^121560613 is an apocalyptic number.

It is an amenable number.

121560613 is a deficient number, since it is larger than the sum of its proper divisors (13624283).

121560613 is a wasteful number, since it uses less digits than its factorization.

121560613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 121560613 is about 11025.4529612166. The cubic root of 121560613 is about 495.3714356651.

The spelling of 121560613 in words is "one hundred twenty-one million, five hundred sixty thousand, six hundred thirteen".