120521979 has 16 divisors (see below), whose sum is σ = 178801440. Its totient is φ = 80235360.

The previous prime is 120521977. The next prime is 120521981. The reversal of 120521979 is 979125021.

120521979 is a `hidden beast` number, since 120 + 521 + 9 + 7 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (120521977) and next prime (120521981).

It is not a de Polignac number, because 120521979 - 2¹ = 120521977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120521971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19449 + ... + 24885.

It is an arithmetic number, because the mean of its divisors is an integer number (11175090).

Almost surely, 2^120521979 is an apocalyptic number.

120521979 is a deficient number, since it is larger than the sum of its proper divisors (58279461).

120521979 is an equidigital number, since it uses as much as digits as its factorization.

120521979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6267 (or 6261 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 120521979 is about 10978.2502704211. The cubic root of 120521979 is about 493.9565531351.

The spelling of 120521979 in words is "one hundred twenty million, five hundred twenty-one thousand, nine hundred seventy-nine".