121605604 has 12 divisors (see below), whose sum is σ = 212946300. Its totient is φ = 60763808.

The previous prime is 121605593. The next prime is 121605637. The reversal of 121605604 is 406506121.

It can be written as a sum of positive squares in 2 ways, for example, as 78676900 + 42928704 = 8870^2 + 6552^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2059 + ... + 15730.

It is an arithmetic number, because the mean of its divisors is an integer number (17745525).

Almost surely, 2^121605604 is an apocalyptic number.

It is an amenable number.

121605604 is a deficient number, since it is larger than the sum of its proper divisors (91340696).

121605604 is a wasteful number, since it uses less digits than its factorization.

121605604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19502 (or 19500 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 121605604 is about 11027.4930968013. The cubic root of 121605604 is about 495.4325423747.

The spelling of 121605604 in words is "one hundred twenty-one million, six hundred five thousand, six hundred four".