121625644 has 36 divisors (see below), whose sum is σ = 248353560. Its totient is φ = 51965760.

The previous prime is 121625641. The next prime is 121625653. The reversal of 121625644 is 446526121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121625641) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 81384 + ... + 82864.

It is an arithmetic number, because the mean of its divisors is an integer number (6898710).

Almost surely, 2^121625644 is an apocalyptic number.

121625644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121625644 is an abundant number, since it is smaller than the sum of its proper divisors (126727916).

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

121625644 is a wasteful number, since it uses less digits than its factorization.

121625644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918 (or 1909 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 121625644 is about 11028.4016974356. The cubic root of 121625644 is about 495.4597558213.

The spelling of 121625644 in words is "one hundred twenty-one million, six hundred twenty-five thousand, six hundred forty-four".