120125309 has 2 divisors, whose sum is σ = 120125310. Its totient is φ = 120125308.

The previous prime is 120125261. The next prime is 120125311. The reversal of 120125309 is 903521021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118156900 + 1968409 = 10870^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 120125309 - 2²⁴ = 103348093 is a prime.

Together with 120125311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120125399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60062654 + 60062655.

It is an arithmetic number, because the mean of its divisors is an integer number (60062655).

Almost surely, 2^120125309 is an apocalyptic number.

It is an amenable number.

120125309 is a deficient number, since it is larger than the sum of its proper divisors (1).

120125309 is an equidigital number, since it uses as much as digits as its factorization.

120125309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 120125309 is about 10960.1692048983. The cubic root of 120125309 is about 493.4140432332.

The spelling of 120125309 in words is "one hundred twenty million, one hundred twenty-five thousand, three hundred nine".