120409057 has 4 divisors (see below), whose sum is σ = 122680980. Its totient is φ = 118137136.

The previous prime is 120409039. The next prime is 120409097. The reversal of 120409057 is 750904021.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 72743841 + 47665216 = 8529^2 + 6904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120409057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120409007) 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, 1135882 + ... + 1135987.

It is an arithmetic number, because the mean of its divisors is an integer number (30670245).

Almost surely, 2^120409057 is an apocalyptic number.

It is an amenable number.

120409057 is a deficient number, since it is larger than the sum of its proper divisors (2271923).

120409057 is an equidigital number, since it uses as much as digits as its factorization.

120409057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271922.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 120409057 is about 10973.1060780437. The cubic root of 120409057 is about 493.8022355247.

The spelling of 120409057 in words is "one hundred twenty million, four hundred nine thousand, fifty-seven".