121644004 has 36 divisors (see below), whose sum is σ = 228519228. Its totient is φ = 56635200.

The previous prime is 121644001. The next prime is 121644013. The reversal of 121644004 is 400446121.

It can be written as a sum of positive squares in 2 ways, for example, as 24029604 + 97614400 = 4902^2 + 9880^2 .

It is not an unprimeable number, because it can be changed into a prime (121644001) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 87394 + ... + 88774.

Almost surely, 2^121644004 is an apocalyptic number.

It is an amenable number.

121644004 is a deficient number, since it is larger than the sum of its proper divisors (106875224).

121644004 is a wasteful number, since it uses less digits than its factorization.

121644004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1484 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 121644004 is about 11029.2340622547. The cubic root of 121644004 is about 495.4846852773.

The spelling of 121644004 in words is "one hundred twenty-one million, six hundred forty-four thousand, four".