12757720 has 32 divisors (see below), whose sum is σ = 28868400. Its totient is φ = 5074048.

The previous prime is 12757649. The next prime is 12757739. The reversal of 12757720 is 2775721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7071 + ... + 8689.

Almost surely, 2^12757720 is an apocalyptic number.

12757720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12757720 is an abundant number, since it is smaller than the sum of its proper divisors (16110680).

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

12757720 is a wasteful number, since it uses less digits than its factorization.

12757720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827 (or 1823 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 31.

The square root of 12757720 is about 3571.7950669096. The cubic root of 12757720 is about 233.6635777251.

The spelling of 12757720 in words is "twelve million, seven hundred fifty-seven thousand, seven hundred twenty".