121644075 has 48 divisors (see below), whose sum is σ = 230985216. Its totient is φ = 55334400.

The previous prime is 121644059. The next prime is 121644091. The reversal of 121644075 is 570446121.

It is an interprime number because it is at equal distance from previous prime (121644059) and next prime (121644091).

It is not a de Polignac number, because 121644075 - 2⁴ = 121644059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137635 + ... + 138515.

It is an arithmetic number, because the mean of its divisors is an integer number (4812192).

Almost surely, 2^121644075 is an apocalyptic number.

121644075 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121644075 is a deficient number, since it is larger than the sum of its proper divisors (109341141).

121644075 is a wasteful number, since it uses less digits than its factorization.

121644075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1159 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 121644075 is about 11029.2372809728. The cubic root of 121644075 is about 495.4847816772.

The spelling of 121644075 in words is "one hundred twenty-one million, six hundred forty-four thousand, seventy-five".