12780579 has 16 divisors (see below), whose sum is σ = 19844352. Its totient is φ = 7164768.

The previous prime is 12780557. The next prime is 12780601. The reversal of 12780579 is 97508721.

It is an interprime number because it is at equal distance from previous prime (12780557) and next prime (12780601).

It is not a de Polignac number, because 12780579 - 2⁸ = 12780323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12780539) 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, 4629 + ... + 6854.

It is an arithmetic number, because the mean of its divisors is an integer number (1240272).

Almost surely, 2^12780579 is an apocalyptic number.

12780579 is a deficient number, since it is larger than the sum of its proper divisors (7063773).

12780579 is a wasteful number, since it uses less digits than its factorization.

12780579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11546.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 12780579 is about 3574.9935664278. The cubic root of 12780579 is about 233.8030521961.

The spelling of 12780579 in words is "twelve million, seven hundred eighty thousand, five hundred seventy-nine".