120542909 has 2 divisors, whose sum is σ = 120542910. Its totient is φ = 120542908.

The previous prime is 120542881. The next prime is 120542927. The reversal of 120542909 is 909245021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112996900 + 7546009 = 10630^2 + 2747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120542909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120542969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60271454 + 60271455.

It is an arithmetic number, because the mean of its divisors is an integer number (60271455).

Almost surely, 2^120542909 is an apocalyptic number.

It is an amenable number.

120542909 is a deficient number, since it is larger than the sum of its proper divisors (1).

120542909 is an equidigital number, since it uses as much as digits as its factorization.

120542909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 120542909 is about 10979.2034774841. The cubic root of 120542909 is about 493.9851451876.

The spelling of 120542909 in words is "one hundred twenty million, five hundred forty-two thousand, nine hundred nine".