126125631 has 12 divisors (see below), whose sum is σ = 182296608. Its totient is φ = 84030624.

The previous prime is 126125627. The next prime is 126125641. The reversal of 126125631 is 136521621.

126125631 is a `hidden beast` number, since 1 + 2 + 6 + 1 + 25 + 631 = 666.

It is not a de Polignac number, because 126125631 - 2² = 126125627 is a prime.

It is a super-2 number, since 2×126125631² = 31815349590296322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 126125595 and 126125604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126125641) 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, 15171 + ... + 21963.

It is an arithmetic number, because the mean of its divisors is an integer number (15191384).

Almost surely, 2^126125631 is an apocalyptic number.

126125631 is a deficient number, since it is larger than the sum of its proper divisors (56170977).

126125631 is a wasteful number, since it uses less digits than its factorization.

126125631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8862 (or 8859 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 126125631 is about 11230.5668156153. The cubic root of 126125631 is about 501.4963586874.

It can be divided in two parts, 126125 and 631, that added together give a triangular number (126756 = T₅₀₃).

The spelling of 126125631 in words is "one hundred twenty-six million, one hundred twenty-five thousand, six hundred thirty-one".