126991264 has 48 divisors (see below), whose sum is σ = 258170976. Its totient is φ = 61459200.

The previous prime is 126991223. The next prime is 126991297. The reversal of 126991264 is 462199621.

It is a super-2 number, since 2×126991264² = 32253562264635392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130299 + ... + 131269.

It is an arithmetic number, because the mean of its divisors is an integer number (5378562).

Almost surely, 2^126991264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126991264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129085488).

126991264 is an abundant number, since it is smaller than the sum of its proper divisors (131179712).

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

126991264 is an equidigital number, since it uses as much as digits as its factorization.

126991264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109 (or 1101 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 126991264 is about 11269.0400655956. The cubic root of 126991264 is about 502.6410438790.

The spelling of 126991264 in words is "one hundred twenty-six million, nine hundred ninety-one thousand, two hundred sixty-four".