12780757 has 16 divisors (see below), whose sum is σ = 14515200. Its totient is φ = 11152240.

The previous prime is 12780743. The next prime is 12780763. The reversal of 12780757 is 75708721.

It is not a de Polignac number, because 12780757 - 2⁷ = 12780629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12780707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30294 + ... + 30712.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^12780757 is an apocalyptic number.

It is an amenable number.

12780757 is a deficient number, since it is larger than the sum of its proper divisors (1734443).

12780757 is a wasteful number, since it uses less digits than its factorization.

12780757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 12780757 is about 3575.0184614908. The cubic root of 12780757 is about 233.8041376125.

The spelling of 12780757 in words is "twelve million, seven hundred eighty thousand, seven hundred fifty-seven".