12780575 has 6 divisors (see below), whose sum is σ = 15847944. Its totient is φ = 10224440.

The previous prime is 12780557. The next prime is 12780601. The reversal of 12780575 is 57508721.

It is not a de Polignac number, because 12780575 - 2⁶ = 12780511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 255587 + ... + 255636.

It is an arithmetic number, because the mean of its divisors is an integer number (2641324).

Almost surely, 2^12780575 is an apocalyptic number.

12780575 is a deficient number, since it is larger than the sum of its proper divisors (3067369).

12780575 is an equidigital number, since it uses as much as digits as its factorization.

12780575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511233 (or 511228 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 12780575 is about 3574.9930069862. The cubic root of 12780575 is about 233.8030278046.

The spelling of 12780575 in words is "twelve million, seven hundred eighty thousand, five hundred seventy-five".