126805881 has 4 divisors (see below), whose sum is σ = 169074512. Its totient is φ = 84537252.

The previous prime is 126805879. The next prime is 126805897. The reversal of 126805881 is 188508621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 126805881 - 2¹ = 126805879 is a prime.

It is a super-2 number, since 2×126805881² = 32159462912372322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126805801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21134311 + ... + 21134316.

It is an arithmetic number, because the mean of its divisors is an integer number (42268628).

Almost surely, 2^126805881 is an apocalyptic number.

It is an amenable number.

126805881 is a deficient number, since it is larger than the sum of its proper divisors (42268631).

126805881 is an equidigital number, since it uses as much as digits as its factorization.

126805881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42268630.

The product of its (nonzero) digits is 30720, while the sum is 39.

The square root of 126805881 is about 11260.8117380587. The cubic root of 126805881 is about 502.3963381129.

The spelling of 126805881 in words is "one hundred twenty-six million, eight hundred five thousand, eight hundred eighty-one".