12400530 has 32 divisors (see below), whose sum is σ = 29887488. Its totient is φ = 3292800.

The previous prime is 12400517. The next prime is 12400541. The reversal of 12400530 is 3500421.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 7695 + ... + 9165.

It is an arithmetic number, because the mean of its divisors is an integer number (933984).

Almost surely, 2^12400530 is an apocalyptic number.

12400530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12400530 is an abundant number, since it is smaller than the sum of its proper divisors (17486958).

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

12400530 is a wasteful number, since it uses less digits than its factorization.

12400530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 12400530 is about 3521.4386264707. The cubic root of 12400530 is about 231.4622030728.

Adding to 12400530 its reverse (3500421), we get a palindrome (15900951).

The spelling of 12400530 in words is "twelve million, four hundred thousand, five hundred thirty".