120245639 has 4 divisors (see below), whose sum is σ = 121348920. Its totient is φ = 119142360.

The previous prime is 120245627. The next prime is 120245677. The reversal of 120245639 is 936542021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936542021 = 43 ⋅21780047.

It is a cyclic number.

It is not a de Polignac number, because 120245639 - 2²⁴ = 103468423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120205639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 551477 + ... + 551694.

It is an arithmetic number, because the mean of its divisors is an integer number (30337230).

Almost surely, 2^120245639 is an apocalyptic number.

120245639 is a deficient number, since it is larger than the sum of its proper divisors (1103281).

120245639 is a wasteful number, since it uses less digits than its factorization.

120245639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103280.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 120245639 is about 10965.6572534436. The cubic root of 120245639 is about 493.5787398565.

The spelling of 120245639 in words is "one hundred twenty million, two hundred forty-five thousand, six hundred thirty-nine".