12737540 has 12 divisors (see below), whose sum is σ = 26748876. Its totient is φ = 5095008.

The previous prime is 12737533. The next prime is 12737587. The reversal of 12737540 is 4573721.

It can be written as a sum of positive squares in 2 ways, for example, as 7139584 + 5597956 = 2672^2 + 2366^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318419 + ... + 318458.

It is an arithmetic number, because the mean of its divisors is an integer number (2229073).

Almost surely, 2^12737540 is an apocalyptic number.

12737540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12737540 is an abundant number, since it is smaller than the sum of its proper divisors (14011336).

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

12737540 is a wasteful number, since it uses less digits than its factorization.

12737540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636886 (or 636884 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 12737540 is about 3568.9690388122. The cubic root of 12737540 is about 233.5403106784.

The spelling of 12737540 in words is "twelve million, seven hundred thirty-seven thousand, five hundred forty".