126556900 has 36 divisors (see below), whose sum is σ = 280482048. Its totient is φ = 49543840.

The previous prime is 126556877. The next prime is 126556907. The reversal of 126556900 is 9655621.

It is a happy number.

It is a super-2 number, since 2×126556900² = 32033297875220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126556907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8764 + ... + 18163.

It is an arithmetic number, because the mean of its divisors is an integer number (7791168).

Almost surely, 2^126556900 is an apocalyptic number.

126556900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126556900 is an abundant number, since it is smaller than the sum of its proper divisors (153925148).

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

126556900 is a wasteful number, since it uses less digits than its factorization.

126556900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26988 (or 26981 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 126556900 is about 11249.7511083579. The cubic root of 126556900 is about 502.0673073669.

The spelling of 126556900 in words is "one hundred twenty-six million, five hundred fifty-six thousand, nine hundred".