120857239 has 4 divisors (see below), whose sum is σ = 125024760. Its totient is φ = 116689720.

The previous prime is 120857237. The next prime is 120857263. The reversal of 120857239 is 932758021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 120857239 - 2¹ = 120857237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120857198 and 120857207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120857237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2083717 + ... + 2083774.

It is an arithmetic number, because the mean of its divisors is an integer number (31256190).

Almost surely, 2^120857239 is an apocalyptic number.

120857239 is a deficient number, since it is larger than the sum of its proper divisors (4167521).

120857239 is an equidigital number, since it uses as much as digits as its factorization.

120857239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4167520.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 120857239 is about 10993.5089484659. The cubic root of 120857239 is about 494.4141475561.

The spelling of 120857239 in words is "one hundred twenty million, eight hundred fifty-seven thousand, two hundred thirty-nine".