12400580 has 12 divisors (see below), whose sum is σ = 26041260. Its totient is φ = 4960224.

The previous prime is 12400571. The next prime is 12400601. The reversal of 12400580 is 8500421.

12400580 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 2 ways, for example, as 7795264 + 4605316 = 2792^2 + 2146^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 620029 = 12400580 / (1 + 2 + 4 + 0 + 0 + 5 + 8 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 309995 + ... + 310034.

It is an arithmetic number, because the mean of its divisors is an integer number (2170105).

Almost surely, 2^12400580 is an apocalyptic number.

12400580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12400580 is an abundant number, since it is smaller than the sum of its proper divisors (13640680).

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

12400580 is a wasteful number, since it uses less digits than its factorization.

12400580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620038 (or 620036 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 12400580 is about 3521.4457258348. The cubic root of 12400580 is about 231.4625141642.

The spelling of 12400580 in words is "twelve million, four hundred thousand, five hundred eighty".