126885631 has 4 divisors (see below), whose sum is σ = 127050552. Its totient is φ = 126720712.

The previous prime is 126885589. The next prime is 126885653. The reversal of 126885631 is 136588621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126885631 - 2¹⁵ = 126852863 is a prime.

It is a super-2 number, since 2×126885631² = 32199926708536322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126882631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81301 + ... + 82846.

It is an arithmetic number, because the mean of its divisors is an integer number (31762638).

Almost surely, 2^126885631 is an apocalyptic number.

126885631 is a deficient number, since it is larger than the sum of its proper divisors (164921).

126885631 is an equidigital number, since it uses as much as digits as its factorization.

126885631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164920.

The product of its digits is 69120, while the sum is 40.

The square root of 126885631 is about 11264.3522228311. The cubic root of 126885631 is about 502.5016374129.

The spelling of 126885631 in words is "one hundred twenty-six million, eight hundred eighty-five thousand, six hundred thirty-one".