13247620 has 24 divisors (see below), whose sum is σ = 27891864. Its totient is φ = 5285376.

The previous prime is 13247603. The next prime is 13247621. The reversal of 13247620 is 2674231.

It can be written as a sum of positive squares in 4 ways, for example, as 114244 + 13133376 = 338^2 + 3624^2 .

It is not an unprimeable number, because it can be changed into a prime (13247621) 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, 11302 + ... + 12418.

It is an arithmetic number, because the mean of its divisors is an integer number (1162161).

Almost surely, 2^13247620 is an apocalyptic number.

13247620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13247620 is an abundant number, since it is smaller than the sum of its proper divisors (14644244).

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

13247620 is a wasteful number, since it uses less digits than its factorization.

13247620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719 (or 1717 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 13247620 is about 3639.7280118163. The cubic root of 13247620 is about 236.6170056042.

It can be divided in two parts, 132476 and 20, that added together give a square (132496 = 364²).

The spelling of 13247620 in words is "thirteen million, two hundred forty-seven thousand, six hundred twenty".