121238564 has 12 divisors (see below), whose sum is σ = 212257500. Its totient is φ = 60593568.

The previous prime is 121238539. The next prime is 121238581. The reversal of 121238564 is 465832121.

It can be written as a sum of positive squares in 2 ways, for example, as 19430464 + 101808100 = 4408^2 + 10090^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 121238564.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7562 + ... + 17310.

It is an arithmetic number, because the mean of its divisors is an integer number (17688125).

Almost surely, 2^121238564 is an apocalyptic number.

It is an amenable number.

121238564 is a deficient number, since it is larger than the sum of its proper divisors (91018936).

121238564 is a wasteful number, since it uses less digits than its factorization.

121238564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12862 (or 12860 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 121238564 is about 11010.8384785174. The cubic root of 121238564 is about 494.9335883423.

The spelling of 121238564 in words is "one hundred twenty-one million, two hundred thirty-eight thousand, five hundred sixty-four".