126642439 has 32 divisors (see below), whose sum is σ = 168689664. Its totient is φ = 92141280.

The previous prime is 126642437. The next prime is 126642443. The reversal of 126642439 is 934246621.

It is a happy number.

It is not a de Polignac number, because 126642439 - 2¹ = 126642437 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 126642398 and 126642407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126642431) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 75322 + ... + 76984.

It is an arithmetic number, because the mean of its divisors is an integer number (5271552).

Almost surely, 2^126642439 is an apocalyptic number.

126642439 is a deficient number, since it is larger than the sum of its proper divisors (42047225).

126642439 is a wasteful number, since it uses less digits than its factorization.

126642439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747.

The product of its digits is 62208, while the sum is 37.

The square root of 126642439 is about 11253.5522836125. The cubic root of 126642439 is about 502.1803965869.

The spelling of 126642439 in words is "one hundred twenty-six million, six hundred forty-two thousand, four hundred thirty-nine".