126261931 has 6 divisors (see below), whose sum is σ = 126880620. Its totient is φ = 125646228.

The previous prime is 126261929. The next prime is 126261937. The reversal of 126261931 is 139162621.

It is not a de Polignac number, because 126261931 - 2¹ = 126261929 is a prime.

It is a super-2 number, since 2×126261931² = 31884150439697522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126261893 and 126261902.

It is not an unprimeable number, because it can be changed into a prime (126261937) 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, 48460 + ... + 50998.

It is an arithmetic number, because the mean of its divisors is an integer number (21146770).

Almost surely, 2^126261931 is an apocalyptic number.

126261931 is a deficient number, since it is larger than the sum of its proper divisors (618689).

126261931 is an frugal number, since it uses more digits than its factorization.

126261931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2985 (or 2762 counting only the distinct ones).

The product of its digits is 3888, while the sum is 31.

The square root of 126261931 is about 11236.6334371110. The cubic root of 126261931 is about 501.6769440959.

The spelling of 126261931 in words is "one hundred twenty-six million, two hundred sixty-one thousand, nine hundred thirty-one".