12653540 has 12 divisors (see below), whose sum is σ = 26572476. Its totient is φ = 5061408.

The previous prime is 12653539. The next prime is 12653551. The reversal of 12653540 is 4535621.

It can be written as a sum of positive squares in 2 ways, for example, as 1737124 + 10916416 = 1318^2 + 3304^2 .

It is a super-2 number, since 2×12653540² = 320224149063200, which contains 22 as substring.

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, 316319 + ... + 316358.

It is an arithmetic number, because the mean of its divisors is an integer number (2214373).

Almost surely, 2^12653540 is an apocalyptic number.

12653540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12653540 is an abundant number, since it is smaller than the sum of its proper divisors (13918936).

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

12653540 is a wasteful number, since it uses less digits than its factorization.

12653540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632686 (or 632684 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 12653540 is about 3557.1814685225. The cubic root of 12653540 is about 233.0258034751.

The spelling of 12653540 in words is "twelve million, six hundred fifty-three thousand, five hundred forty".