12317540 has 24 divisors (see below), whose sum is σ = 26702592. Its totient is φ = 4767840.

The previous prime is 12317531. The next prime is 12317563. The reversal of 12317540 is 4571321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9314 + ... + 10553.

It is an arithmetic number, because the mean of its divisors is an integer number (1112608).

Almost surely, 2^12317540 is an apocalyptic number.

12317540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12317540 is an abundant number, since it is smaller than the sum of its proper divisors (14385052).

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

12317540 is a wasteful number, since it uses less digits than its factorization.

12317540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19907 (or 19905 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 12317540 is about 3509.6353086895. The cubic root of 12317540 is about 230.9446966927.

Adding to 12317540 its reverse (4571321), we get a palindrome (16888861).

The spelling of 12317540 in words is "twelve million, three hundred seventeen thousand, five hundred forty".