126138772 has 12 divisors (see below), whose sum is σ = 226709140. Its totient is φ = 61364736.

The previous prime is 126138767. The next prime is 126138773. The reversal of 126138772 is 277831621.

It can be written as a sum of positive squares in 2 ways, for example, as 86750596 + 39388176 = 9314^2 + 6276^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126138773) 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 3 ways as a sum of consecutive naturals, for example, 425997 + ... + 426292.

Almost surely, 2^126138772 is an apocalyptic number.

It is an amenable number.

126138772 is a deficient number, since it is larger than the sum of its proper divisors (100570368).

126138772 is a wasteful number, since it uses less digits than its factorization.

126138772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852330 (or 852328 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 126138772 is about 11231.1518554421. The cubic root of 126138772 is about 501.5137750120.

The spelling of 126138772 in words is "one hundred twenty-six million, one hundred thirty-eight thousand, seven hundred seventy-two".