121161604 has 24 divisors (see below), whose sum is σ = 219020760. Its totient is φ = 58616064.

The previous prime is 121161587. The next prime is 121161619. The reversal of 121161604 is 406161121.

It can be written as a sum of positive squares in 4 ways, for example, as 12960000 + 108201604 = 3600^2 + 10402^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11562 + ... + 19390.

It is an arithmetic number, because the mean of its divisors is an integer number (9125865).

Almost surely, 2^121161604 is an apocalyptic number.

It is an amenable number.

121161604 is a deficient number, since it is larger than the sum of its proper divisors (97859156).

121161604 is a wasteful number, since it uses less digits than its factorization.

121161604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7959 (or 7957 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 121161604 is about 11007.3431853468. The cubic root of 121161604 is about 494.8288412767.

It can be divided in two parts, 121 and 161604, that multiplied together give a square (19554084 = 4422²).

The spelling of 121161604 in words is "one hundred twenty-one million, one hundred sixty-one thousand, six hundred four".