126640530 has 64 divisors (see below), whose sum is σ = 352408320. Its totient is φ = 32300928.

The previous prime is 126640523. The next prime is 126640541. The reversal of 126640530 is 35046621.

126640530 is a `hidden beast` number, since 12 + 6 + 640 + 5 + 3 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 126640494 and 126640503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3987 + ... + 16406.

It is an arithmetic number, because the mean of its divisors is an integer number (5506380).

Almost surely, 2^126640530 is an apocalyptic number.

126640530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126640530 is an abundant number, since it is smaller than the sum of its proper divisors (225767790).

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

126640530 is a wasteful number, since it uses less digits than its factorization.

126640530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20432 (or 20426 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 126640530 is about 11253.4674656303. The cubic root of 126640530 is about 502.1778732959.

The spelling of 126640530 in words is "one hundred twenty-six million, six hundred forty thousand, five hundred thirty".