121652865 has 24 divisors (see below), whose sum is σ = 220034880. Its totient is φ = 62060064.

The previous prime is 121652827. The next prime is 121652899. The reversal of 121652865 is 568256121.

121652865 is a `hidden beast` number, since 121 + 6 + 528 + 6 + 5 = 666.

It is not a de Polignac number, because 121652865 - 2⁷ = 121652737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57735 + ... + 59804.

It is an arithmetic number, because the mean of its divisors is an integer number (9168120).

Almost surely, 2^121652865 is an apocalyptic number.

121652865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121652865 is a deficient number, since it is larger than the sum of its proper divisors (98382015).

121652865 is a wasteful number, since it uses less digits than its factorization.

121652865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117573 (or 117570 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 121652865 is about 11029.6357600784. The cubic root of 121652865 is about 495.4967159653.

The spelling of 121652865 in words is "one hundred twenty-one million, six hundred fifty-two thousand, eight hundred sixty-five".