126775731 has 16 divisors (see below), whose sum is σ = 173859840. Its totient is φ = 82121280.

The previous prime is 126775711. The next prime is 126775741. The reversal of 126775731 is 137577621.

It is not a de Polignac number, because 126775731 - 2⁷ = 126775603 is a prime.

It is a super-2 number, since 2×126775731² = 32144171941168722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126775731.

It is not an unprimeable number, because it can be changed into a prime (126775711) 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, 30390 + ... + 34308.

It is an arithmetic number, because the mean of its divisors is an integer number (10866240).

Almost surely, 2^126775731 is an apocalyptic number.

126775731 is a deficient number, since it is larger than the sum of its proper divisors (47084109).

126775731 is a wasteful number, since it uses less digits than its factorization.

126775731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4226.

The product of its digits is 61740, while the sum is 39.

The square root of 126775731 is about 11259.4729450361. The cubic root of 126775731 is about 502.3565175353.

The spelling of 126775731 in words is "one hundred twenty-six million, seven hundred seventy-five thousand, seven hundred thirty-one".