120642439 has 2 divisors, whose sum is σ = 120642440. Its totient is φ = 120642438.

The previous prime is 120642413. The next prime is 120642443. The reversal of 120642439 is 934246021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120642439 is a prime.

It is a Chen prime.

It is equal to p_6876130 and since 120642439 and 6876130 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120642439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120642479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60321219 + 60321220.

It is an arithmetic number, because the mean of its divisors is an integer number (60321220).

Almost surely, 2^120642439 is an apocalyptic number.

120642439 is a deficient number, since it is larger than the sum of its proper divisors (1).

120642439 is an equidigital number, since it uses as much as digits as its factorization.

120642439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 120642439 is about 10983.7352025620. The cubic root of 120642439 is about 494.1210658491.

The spelling of 120642439 in words is "one hundred twenty million, six hundred forty-two thousand, four hundred thirty-nine".