126091881 has 12 divisors (see below), whose sum is σ = 183294852. Its totient is φ = 83524896.

The previous prime is 126091877. The next prime is 126091883. The reversal of 126091881 is 188190621.

It can be written as a sum of positive squares in 2 ways, for example, as 47610000 + 78481881 = 6900^2 + 8859^2 .

It is not a de Polignac number, because 126091881 - 2² = 126091877 is a prime.

It is a super-2 number, since 2×126091881² = 31798324908236322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126091883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43206 + ... + 46031.

It is an arithmetic number, because the mean of its divisors is an integer number (15274571).

Almost surely, 2^126091881 is an apocalyptic number.

It is an amenable number.

126091881 is a deficient number, since it is larger than the sum of its proper divisors (57202971).

126091881 is a wasteful number, since it uses less digits than its factorization.

126091881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89400 (or 89397 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 126091881 is about 11229.0641195070. The cubic root of 126091881 is about 501.4516228371.

The spelling of 126091881 in words is "one hundred twenty-six million, ninety-one thousand, eight hundred eighty-one".