12780612 has 48 divisors (see below), whose sum is σ = 35687680. Its totient is φ = 3932064.

The previous prime is 12780611. The next prime is 12780613. The reversal of 12780612 is 21608721.

It is an interprime number because it is at equal distance from previous prime (12780611) and next prime (12780613).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12780611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3148 + ... + 5955.

Almost surely, 2^12780612 is an apocalyptic number.

12780612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12780612 is an abundant number, since it is smaller than the sum of its proper divisors (22907068).

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

12780612 is a wasteful number, since it uses less digits than its factorization.

12780612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9129 (or 9121 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 12780612 is about 3574.9981818177. The cubic root of 12780612 is about 233.8032534258.

The spelling of 12780612 in words is "twelve million, seven hundred eighty thousand, six hundred twelve".