126261660 has 48 divisors (see below), whose sum is σ = 404038656. Its totient is φ = 28859712.

The previous prime is 126261647. The next prime is 126261661. The reversal of 126261660 is 66162621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126261661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149892 + ... + 150731.

It is an arithmetic number, because the mean of its divisors is an integer number (8417472).

Almost surely, 2^126261660 is an apocalyptic number.

126261660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126261660 is an abundant number, since it is smaller than the sum of its proper divisors (277776996).

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

126261660 is a wasteful number, since it uses less digits than its factorization.

126261660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300642 (or 300640 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 126261660 is about 11236.6213783325. The cubic root of 126261660 is about 501.6765851739.

The spelling of 126261660 in words is "one hundred twenty-six million, two hundred sixty-one thousand, six hundred sixty".