126731660 has 48 divisors (see below), whose sum is σ = 298196640. Its totient is φ = 44835840.

The previous prime is 126731611. The next prime is 126731677. The reversal of 126731660 is 66137621.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356 + ... + 15924.

It is an arithmetic number, because the mean of its divisors is an integer number (6212430).

Almost surely, 2^126731660 is an apocalyptic number.

126731660 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 126731660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (149098320).

126731660 is an abundant number, since it is smaller than the sum of its proper divisors (171464980).

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

126731660 is a wasteful number, since it uses less digits than its factorization.

126731660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15626 (or 15624 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 126731660 is about 11257.5157117368. The cubic root of 126731660 is about 502.2982994525.

The spelling of 126731660 in words is "one hundred twenty-six million, seven hundred thirty-one thousand, six hundred sixty".