126445639 has 2 divisors, whose sum is σ = 126445640. Its totient is φ = 126445638.

The previous prime is 126445607. The next prime is 126445661. The reversal of 126445639 is 936544621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 126445639 - 2⁵ = 126445607 is a prime.

It is a congruent number.

It is a weakly prime.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63222819 + 63222820.

It is an arithmetic number, because the mean of its divisors is an integer number (63222820).

Almost surely, 2^126445639 is an apocalyptic number.

126445639 is a deficient number, since it is larger than the sum of its proper divisors (1).

126445639 is an equidigital number, since it uses as much as digits as its factorization.

126445639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 40.

The square root of 126445639 is about 11244.8049783000. The cubic root of 126445639 is about 501.9201353877.

The spelling of 126445639 in words is "one hundred twenty-six million, four hundred forty-five thousand, six hundred thirty-nine".