126564720 has 40 divisors (see below), whose sum is σ = 392351376. Its totient is φ = 33750528.

The previous prime is 126564709. The next prime is 126564751. The reversal of 126564720 is 27465621.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 263437 + ... + 263916.

Almost surely, 2^126564720 is an apocalyptic number.

126564720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126564720 is an abundant number, since it is smaller than the sum of its proper divisors (265786656).

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

126564720 is a wasteful number, since it uses less digits than its factorization.

126564720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527369 (or 527363 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 126564720 is about 11250.0986662340. The cubic root of 126564720 is about 502.0776481319.

Subtracting from 126564720 its reverse (27465621), we obtain a palindrome (99099099).

The spelling of 126564720 in words is "one hundred twenty-six million, five hundred sixty-four thousand, seven hundred twenty".