12781480 has 32 divisors (see below), whose sum is σ = 29305800. Its totient is φ = 5015296.

The previous prime is 12781459. The next prime is 12781487. The reversal of 12781480 is 8418721.

It can be written as a sum of positive squares in 4 ways, for example, as 12687844 + 93636 = 3562^2 + 306^2 .

It is a super-3 number, since 3×12781480³ (a number of 22 digits) contains 333 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (12781487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895 + ... + 5134.

Almost surely, 2^12781480 is an apocalyptic number.

12781480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12781480 is an abundant number, since it is smaller than the sum of its proper divisors (16524320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12781480 is a wasteful number, since it uses less digits than its factorization.

12781480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6093 (or 6089 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 12781480 is about 3575.1195784197. The cubic root of 12781480 is about 233.8085462508.

The spelling of 12781480 in words is "twelve million, seven hundred eighty-one thousand, four hundred eighty".