126556420 has 48 divisors (see below), whose sum is σ = 271272960. Its totient is φ = 49585536.

The previous prime is 126556399. The next prime is 126556433. The reversal of 126556420 is 24655621.

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 15 ways as a sum of consecutive naturals, for example, 273109 + ... + 273571.

It is an arithmetic number, because the mean of its divisors is an integer number (5651520).

Almost surely, 2^126556420 is an apocalyptic number.

126556420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126556420 is an abundant number, since it is smaller than the sum of its proper divisors (144716540).

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

126556420 is a wasteful number, since it uses less digits than its factorization.

126556420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 722 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 126556420 is about 11249.7297745324. The cubic root of 126556420 is about 502.0666726258.

The spelling of 126556420 in words is "one hundred twenty-six million, five hundred fifty-six thousand, four hundred twenty".