12947740 has 48 divisors (see below), whose sum is σ = 30834720. Its totient is φ = 4527360.

The previous prime is 12947731. The next prime is 12947771. The reversal of 12947740 is 4774921.

It is a super-2 number, since 2×12947740² = 335287942215200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12947696 and 12947705.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3630 + ... + 6250.

It is an arithmetic number, because the mean of its divisors is an integer number (642390).

Almost surely, 2^12947740 is an apocalyptic number.

12947740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12947740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15417360).

12947740 is an abundant number, since it is smaller than the sum of its proper divisors (17886980).

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

12947740 is a wasteful number, since it uses less digits than its factorization.

12947740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662 (or 2660 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 12947740 is about 3598.2968193299. The cubic root of 12947740 is about 234.8179667728.

The spelling of 12947740 in words is "twelve million, nine hundred forty-seven thousand, seven hundred forty".