12531340 has 24 divisors (see below), whose sum is σ = 26636400. Its totient is φ = 4951488.

The previous prime is 12531331. The next prime is 12531341. The reversal of 12531340 is 4313521.

It is not an unprimeable number, because it can be changed into a prime (12531341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2115 + ... + 5434.

It is an arithmetic number, because the mean of its divisors is an integer number (1109850).

Almost surely, 2^12531340 is an apocalyptic number.

12531340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12531340 is an abundant number, since it is smaller than the sum of its proper divisors (14105060).

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

12531340 is a wasteful number, since it uses less digits than its factorization.

12531340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7641 (or 7639 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 12531340 is about 3539.9632766457. The cubic root of 12531340 is about 232.2732363355.

Adding to 12531340 its reverse (4313521), we get a palindrome (16844861).

The spelling of 12531340 in words is "twelve million, five hundred thirty-one thousand, three hundred forty".