12917140 has 12 divisors (see below), whose sum is σ = 27126036. Its totient is φ = 5166848.

The previous prime is 12917137. The next prime is 12917141. The reversal of 12917140 is 4171921.

It can be written as a sum of positive squares in 2 ways, for example, as 7214596 + 5702544 = 2686^2 + 2388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12917141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322909 + ... + 322948.

It is an arithmetic number, because the mean of its divisors is an integer number (2260503).

Almost surely, 2^12917140 is an apocalyptic number.

12917140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12917140 is an abundant number, since it is smaller than the sum of its proper divisors (14208896).

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

12917140 is a wasteful number, since it uses less digits than its factorization.

12917140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645866 (or 645864 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 12917140 is about 3594.0422924612. The cubic root of 12917140 is about 234.6328354222.

The spelling of 12917140 in words is "twelve million, nine hundred seventeen thousand, one hundred forty".