12787240 has 16 divisors (see below), whose sum is σ = 28771380. Its totient is φ = 5114880.

The previous prime is 12787207. The next prime is 12787267. The reversal of 12787240 is 4278721.

It can be written as a sum of positive squares in 2 ways, for example, as 10614564 + 2172676 = 3258^2 + 1474^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159801 + ... + 159880.

Almost surely, 2^12787240 is an apocalyptic number.

12787240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12787240 is an abundant number, since it is smaller than the sum of its proper divisors (15984140).

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

12787240 is a wasteful number, since it uses less digits than its factorization.

12787240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319692 (or 319688 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 12787240 is about 3575.9250551431. The cubic root of 12787240 is about 233.8436630754.

The spelling of 12787240 in words is "twelve million, seven hundred eighty-seven thousand, two hundred forty".