12780476 has 12 divisors (see below), whose sum is σ = 22732920. Its totient is φ = 6285360.

The previous prime is 12780409. The next prime is 12780511. The reversal of 12780476 is 67408721.

It is a happy number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 25946 + ... + 26433.

It is an arithmetic number, because the mean of its divisors is an integer number (1894410).

Almost surely, 2^12780476 is an apocalyptic number.

It is an amenable number.

12780476 is a deficient number, since it is larger than the sum of its proper divisors (9952444).

12780476 is a wasteful number, since it uses less digits than its factorization.

12780476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52444 (or 52442 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 12780476 is about 3574.9791607784. The cubic root of 12780476 is about 233.8024241135.

The spelling of 12780476 in words is "twelve million, seven hundred eighty thousand, four hundred seventy-six".