13661825 has 12 divisors (see below), whose sum is σ = 17009328. Its totient is φ = 10885200.

The previous prime is 13661803. The next prime is 13661833. The reversal of 13661825 is 52816631.

It is a happy number.

It is not a de Polignac number, because 13661825 - 2¹⁸ = 13399681 is a prime.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13661791 and 13661800.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6110 + ... + 8040.

It is an arithmetic number, because the mean of its divisors is an integer number (1417444).

Almost surely, 2^13661825 is an apocalyptic number.

It is an amenable number.

13661825 is a deficient number, since it is larger than the sum of its proper divisors (3347503).

13661825 is a wasteful number, since it uses less digits than its factorization.

13661825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224 (or 2219 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 13661825 is about 3696.1906065570. The cubic root of 13661825 is about 239.0577931350.

The spelling of 13661825 in words is "thirteen million, six hundred sixty-one thousand, eight hundred twenty-five".