126621439 has 6 divisors (see below), whose sum is σ = 147294384. Its totient is φ = 108532620.

The previous prime is 126621433. The next prime is 126621449. The reversal of 126621439 is 934126621.

It is a happy number.

It is not a de Polignac number, because 126621439 - 2²³ = 118232831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126621433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1292007 + ... + 1292104.

It is an arithmetic number, because the mean of its divisors is an integer number (24549064).

Almost surely, 2^126621439 is an apocalyptic number.

126621439 is a deficient number, since it is larger than the sum of its proper divisors (20672945).

126621439 is an equidigital number, since it uses as much as digits as its factorization.

126621439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584125 (or 2584118 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 126621439 is about 11252.6192062115. The cubic root of 126621439 is about 502.1526376688.

The spelling of 126621439 in words is "one hundred twenty-six million, six hundred twenty-one thousand, four hundred thirty-nine".