121815652 has 24 divisors (see below), whose sum is σ = 244508096. Its totient is φ = 52018848.

The previous prime is 121815641. The next prime is 121815679. The reversal of 121815652 is 256518121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238 + ... + 15610.

Almost surely, 2^121815652 is an apocalyptic number.

It is an amenable number.

121815652 is an abundant number, since it is smaller than the sum of its proper divisors (122692444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121815652 is a wasteful number, since it uses less digits than its factorization.

121815652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15667 (or 15665 counting only the distinct ones).

The product of its digits is 4800, while the sum is 31.

The square root of 121815652 is about 11037.0128205054. The cubic root of 121815652 is about 495.7176299916.

The spelling of 121815652 in words is "one hundred twenty-one million, eight hundred fifteen thousand, six hundred fifty-two".