12540030 has 32 divisors (see below), whose sum is σ = 30288384. Its totient is φ = 3322656.

The previous prime is 12539993. The next prime is 12540041. The reversal of 12540030 is 3004521.

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

It is a junction number, because it is equal to n+sod(n) for n = 12539991 and 12540009.

It is a congruent number.

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, 3759 + ... + 6261.

It is an arithmetic number, because the mean of its divisors is an integer number (946512).

Almost surely, 2^12540030 is an apocalyptic number.

12540030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12540030 is an abundant number, since it is smaller than the sum of its proper divisors (17748354).

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

12540030 is a wasteful number, since it uses less digits than its factorization.

12540030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680.

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

The square root of 12540030 is about 3541.1904777913. The cubic root of 12540030 is about 232.3269147671.

Adding to 12540030 its reverse (3004521), we get a palindrome (15544551).

The spelling of 12540030 in words is "twelve million, five hundred forty thousand, thirty".