126172986 has 32 divisors (see below), whose sum is σ = 266302080. Its totient is φ = 39773184.

The previous prime is 126172979. The next prime is 126173029. The reversal of 126172986 is 689271621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7146 + ... + 17418.

It is an arithmetic number, because the mean of its divisors is an integer number (8321940).

Almost surely, 2^126172986 is an apocalyptic number.

126172986 is an abundant number, since it is smaller than the sum of its proper divisors (140129094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126172986 is a wasteful number, since it uses less digits than its factorization.

126172986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10390.

The product of its digits is 72576, while the sum is 42.

The square root of 126172986 is about 11232.6749263032. The cubic root of 126172986 is about 501.5591146034.

It can be divided in two parts, 1261 and 72986, that added together give a palindrome (74247).

The spelling of 126172986 in words is "one hundred twenty-six million, one hundred seventy-two thousand, nine hundred eighty-six".