121624139 has 8 divisors (see below), whose sum is σ = 149691360. Its totient is φ = 96230016.

The previous prime is 121624127. The next prime is 121624147. The reversal of 121624139 is 931426121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121624139 - 2⁴ = 121624123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121624159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668174 + ... + 668355.

It is an arithmetic number, because the mean of its divisors is an integer number (18711420).

Almost surely, 2^121624139 is an apocalyptic number.

121624139 is a deficient number, since it is larger than the sum of its proper divisors (28067221).

121624139 is a wasteful number, since it uses less digits than its factorization.

121624139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336549.

The product of its digits is 2592, while the sum is 29.

The square root of 121624139 is about 11028.3334643091. Note that the first 3 decimals coincide. The cubic root of 121624139 is about 495.4577122007.

The spelling of 121624139 in words is "one hundred twenty-one million, six hundred twenty-four thousand, one hundred thirty-nine".