12502530 has 24 divisors (see below), whose sum is σ = 32506812. Its totient is φ = 3333984.

The previous prime is 12502507. The next prime is 12502543. The reversal of 12502530 is 3520521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10830681 + 1671849 = 3291^2 + 1293^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69369 + ... + 69548.

Almost surely, 2^12502530 is an apocalyptic number.

12502530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12502530 is an abundant number, since it is smaller than the sum of its proper divisors (20004282).

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

12502530 is a wasteful number, since it uses less digits than its factorization.

12502530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138930 (or 138927 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 12502530 is about 3535.8916838614. The cubic root of 12502530 is about 232.0950982507.

Subtracting from 12502530 its reverse (3520521), we obtain a square (8982009 = 2997²).

The spelling of 12502530 in words is "twelve million, five hundred two thousand, five hundred thirty".