126400656 has 40 divisors (see below), whose sum is σ = 332076960. Its totient is φ = 41418496.

The previous prime is 126400643. The next prime is 126400667. The reversal of 126400656 is 656004621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19485 + ... + 25148.

It is an arithmetic number, because the mean of its divisors is an integer number (8301924).

Almost surely, 2^126400656 is an apocalyptic number.

126400656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

126400656 is an abundant number, since it is smaller than the sum of its proper divisors (205676304).

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

126400656 is a wasteful number, since it uses less digits than its factorization.

126400656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44703 (or 44697 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 126400656 is about 11242.8046322970. The cubic root of 126400656 is about 501.8606090133.

The spelling of 126400656 in words is "one hundred twenty-six million, four hundred thousand, six hundred fifty-six".