12757520 has 20 divisors (see below), whose sum is σ = 29661420. Its totient is φ = 5102976.

The previous prime is 12757517. The next prime is 12757543. The reversal of 12757520 is 2575721.

It can be written as a sum of positive squares in 2 ways, for example, as 5161984 + 7595536 = 2272^2 + 2756^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 79655 + ... + 79814.

It is an arithmetic number, because the mean of its divisors is an integer number (1483071).

Almost surely, 2^12757520 is an apocalyptic number.

12757520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12757520 is an abundant number, since it is smaller than the sum of its proper divisors (16903900).

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

12757520 is a wasteful number, since it uses less digits than its factorization.

12757520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159482 (or 159476 counting only the distinct ones).

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 12757520 is about 3571.7670696729. The cubic root of 12757520 is about 233.6623566877.

The spelling of 12757520 in words is "twelve million, seven hundred fifty-seven thousand, five hundred twenty".