13890225 has 24 divisors (see below), whose sum is σ = 23123520. Its totient is φ = 7357120.

The previous prime is 13890223. The next prime is 13890257. The reversal of 13890225 is 52209831.

It is a happy number.

It is not a de Polignac number, because 13890225 - 2¹ = 13890223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13890192 and 13890201.

It is not an unprimeable number, because it can be changed into a prime (13890223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11971 + ... + 13079.

It is an arithmetic number, because the mean of its divisors is an integer number (963480).

Almost surely, 2^13890225 is an apocalyptic number.

13890225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13890225 is a deficient number, since it is larger than the sum of its proper divisors (9233295).

13890225 is a wasteful number, since it uses less digits than its factorization.

13890225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 13890225 is about 3726.9592163049. The cubic root of 13890225 is about 240.3826361601.

The spelling of 13890225 in words is "thirteen million, eight hundred ninety thousand, two hundred twenty-five".