126779172 has 48 divisors (see below), whose sum is σ = 335348160. Its totient is φ = 36955008.

The previous prime is 126779161. The next prime is 126779201. The reversal of 126779172 is 271977621.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

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, 18423 + ... + 24350.

It is an arithmetic number, because the mean of its divisors is an integer number (6986420).

Almost surely, 2^126779172 is an apocalyptic number.

126779172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

126779172 is an abundant number, since it is smaller than the sum of its proper divisors (208568988).

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

126779172 is a wasteful number, since it uses less digits than its factorization.

126779172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42812 (or 42810 counting only the distinct ones).

The product of its digits is 74088, while the sum is 42.

The square root of 126779172 is about 11259.6257486650. The cubic root of 126779172 is about 502.3610625512.

The spelling of 126779172 in words is "one hundred twenty-six million, seven hundred seventy-nine thousand, one hundred seventy-two".