120857619 has 4 divisors (see below), whose sum is σ = 161143496. Its totient is φ = 80571744.

The previous prime is 120857609. The next prime is 120857621. The reversal of 120857619 is 916758021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 916758021 = 3 ⋅305586007.

It is not a de Polignac number, because 120857619 - 2⁴ = 120857603 is a prime.

It is a super-2 number, since 2×120857619² = 29213128140698322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120857609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20142934 + ... + 20142939.

It is an arithmetic number, because the mean of its divisors is an integer number (40285874).

Almost surely, 2^120857619 is an apocalyptic number.

120857619 is a deficient number, since it is larger than the sum of its proper divisors (40285877).

120857619 is an equidigital number, since it uses as much as digits as its factorization.

120857619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40285876.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 120857619 is about 10993.5262313782. The cubic root of 120857619 is about 494.4146657355.

The spelling of 120857619 in words is "one hundred twenty million, eight hundred fifty-seven thousand, six hundred nineteen".