120255639 has 8 divisors (see below), whose sum is σ = 183246720. Its totient is φ = 68717496.

The previous prime is 120255631. The next prime is 120255659. The reversal of 120255639 is 936552021.

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

It is not a de Polignac number, because 120255639 - 2³ = 120255631 is a prime.

It is a super-2 number, since 2×120255639² = 28922837422596642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120255631) 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, 2863209 + ... + 2863250.

It is an arithmetic number, because the mean of its divisors is an integer number (22905840).

Almost surely, 2^120255639 is an apocalyptic number.

120255639 is a deficient number, since it is larger than the sum of its proper divisors (62991081).

120255639 is an equidigital number, since it uses as much as digits as its factorization.

120255639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726469.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 120255639 is about 10966.1132129848. The cubic root of 120255639 is about 493.5924219898.

The spelling of 120255639 in words is "one hundred twenty million, two hundred fifty-five thousand, six hundred thirty-nine".