120156397 has 4 divisors (see below), whose sum is σ = 122126236. Its totient is φ = 118186560.

The previous prime is 120156383. The next prime is 120156409. The reversal of 120156397 is 793651021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 793651021 = 2161 ⋅367261.

It can be written as a sum of positive squares in 2 ways, for example, as 27342441 + 92813956 = 5229^2 + 9634^2 .

It is a cyclic number.

It is not a de Polignac number, because 120156397 - 2⁷ = 120156269 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 (120157397) 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, 984828 + ... + 984949.

It is an arithmetic number, because the mean of its divisors is an integer number (30531559).

Almost surely, 2^120156397 is an apocalyptic number.

It is an amenable number.

120156397 is a deficient number, since it is larger than the sum of its proper divisors (1969839).

120156397 is an equidigital number, since it uses as much as digits as its factorization.

120156397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969838.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 120156397 is about 10961.5873394322. The cubic root of 120156397 is about 493.4566041580.

The spelling of 120156397 in words is "one hundred twenty million, one hundred fifty-six thousand, three hundred ninety-seven".