12781430 has 16 divisors (see below), whose sum is σ = 23212224. Its totient is φ = 5066880.

The previous prime is 12781429. The next prime is 12781441. The reversal of 12781430 is 3418721.

12781430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 12781430.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4526 + ... + 6785.

It is an arithmetic number, because the mean of its divisors is an integer number (1450764).

Almost surely, 2^12781430 is an apocalyptic number.

12781430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12781430 is a deficient number, since it is larger than the sum of its proper divisors (10430794).

12781430 is a wasteful number, since it uses less digits than its factorization.

12781430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11431.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 12781430 is about 3575.1125856398. The cubic root of 12781430 is about 233.8082413711.

The spelling of 12781430 in words is "twelve million, seven hundred eighty-one thousand, four hundred thirty".