125726731 has 16 divisors (see below), whose sum is σ = 140492800. Its totient is φ = 111728160.

The previous prime is 125726723. The next prime is 125726753. The reversal of 125726731 is 137627521.

It is a cyclic number.

It is not a de Polignac number, because 125726731 - 2³ = 125726723 is a prime.

It is a super-2 number, since 2×125726731² = 31614421775892722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125726701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89170 + ... + 90568.

It is an arithmetic number, because the mean of its divisors is an integer number (8780800).

Almost surely, 2^125726731 is an apocalyptic number.

125726731 is a deficient number, since it is larger than the sum of its proper divisors (14766069).

125726731 is a wasteful number, since it uses less digits than its factorization.

125726731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666.

The product of its digits is 17640, while the sum is 34.

The square root of 125726731 is about 11212.7931845727. The cubic root of 125726731 is about 500.9671028847.

The spelling of 125726731 in words is "one hundred twenty-five million, seven hundred twenty-six thousand, seven hundred thirty-one".