121515652 has 24 divisors (see below), whose sum is σ = 215927712. Its totient is φ = 59827200.

The previous prime is 121515637. The next prime is 121515671. The reversal of 121515652 is 256515121.

It is a self number, because there is not a number n which added to its sum of digits gives 121515652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189252 + ... + 189892.

It is an arithmetic number, because the mean of its divisors is an integer number (8996988).

Almost surely, 2^121515652 is an apocalyptic number.

It is an amenable number.

121515652 is a deficient number, since it is larger than the sum of its proper divisors (94412060).

121515652 is a wasteful number, since it uses less digits than its factorization.

121515652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299 (or 1297 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The square root of 121515652 is about 11023.4138087981. The cubic root of 121515652 is about 495.3103546372.

The spelling of 121515652 in words is "one hundred twenty-one million, five hundred fifteen thousand, six hundred fifty-two".