121624140 has 48 divisors (see below), whose sum is σ = 371508480. Its totient is φ = 29484480.

The previous prime is 121624127. The next prime is 121624147. The reversal of 121624140 is 41426121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121624147) 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 15 ways as a sum of consecutive naturals, for example, 91480 + ... + 92799.

It is an arithmetic number, because the mean of its divisors is an integer number (7739760).

Almost surely, 2^121624140 is an apocalyptic number.

121624140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121624140 is an abundant number, since it is smaller than the sum of its proper divisors (249884340).

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

121624140 is a wasteful number, since it uses less digits than its factorization.

121624140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184302 (or 184300 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 121624140 is about 11028.3335096469. Note that the first 3 decimals coincide. The cubic root of 121624140 is about 495.4577135586.

The spelling of 121624140 in words is "one hundred twenty-one million, six hundred twenty-four thousand, one hundred forty".