121644252 has 36 divisors (see below), whose sum is σ = 308348040. Its totient is φ = 40434912.

The previous prime is 121644239. The next prime is 121644269. The reversal of 121644252 is 252446121.

121644252 is a `hidden beast` number, since 1 + 216 + 442 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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, 8899 + ... + 17957.

Almost surely, 2^121644252 is an apocalyptic number.

121644252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121644252 is an abundant number, since it is smaller than the sum of its proper divisors (186703788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121644252 is a wasteful number, since it uses less digits than its factorization.

121644252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9442 (or 9437 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 121644252 is about 11029.2453050968. The cubic root of 121644252 is about 495.4850219979.

The spelling of 121644252 in words is "one hundred twenty-one million, six hundred forty-four thousand, two hundred fifty-two".