126555660 has 288 divisors, whose sum is σ = 500677632. Its totient is φ = 25090560.

The previous prime is 126555617. The next prime is 126555673. The reversal of 126555660 is 66555621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 318582 + ... + 318978.

It is an arithmetic number, because the mean of its divisors is an integer number (1738464).

Almost surely, 2^126555660 is an apocalyptic number.

126555660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 126555660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250338816).

126555660 is an abundant number, since it is smaller than the sum of its proper divisors (374121972).

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

126555660 is a wasteful number, since it uses less digits than its factorization.

126555660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 448 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 126555660 is about 11249.6959958925. The cubic root of 126555660 is about 502.0656676157.

The spelling of 126555660 in words is "one hundred twenty-six million, five hundred fifty-five thousand, six hundred sixty".