126134721 has 6 divisors (see below), whose sum is σ = 182194610. Its totient is φ = 84089808.

The previous prime is 126134707. The next prime is 126134731. The reversal of 126134721 is 127431621.

126134721 is a `hidden beast` number, since 1 + 2 + 613 + 47 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 120560400 + 5574321 = 10980^2 + 2361^2 .

It is not a de Polignac number, because 126134721 - 2⁵ = 126134689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126134731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7007476 + ... + 7007493.

Almost surely, 2^126134721 is an apocalyptic number.

It is an amenable number.

126134721 is a deficient number, since it is larger than the sum of its proper divisors (56059889).

126134721 is a wasteful number, since it uses less digits than its factorization.

126134721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14014975 (or 14014972 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 126134721 is about 11230.9715073986. The cubic root of 126134721 is about 501.5084061789.

The spelling of 126134721 in words is "one hundred twenty-six million, one hundred thirty-four thousand, seven hundred twenty-one".