13404225 has 24 divisors (see below), whose sum is σ = 22271392. Its totient is φ = 7113600.

The previous prime is 13404169. The next prime is 13404233. The reversal of 13404225 is 52240431.

It is not a de Polignac number, because 13404225 - 2⁸ = 13403969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23190 + ... + 23760.

Almost surely, 2^13404225 is an apocalyptic number.

13404225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13404225 is a deficient number, since it is larger than the sum of its proper divisors (8867167).

13404225 is a wasteful number, since it uses less digits than its factorization.

13404225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 13404225 is about 3661.1780890855. The cubic root of 13404225 is about 237.5457344981.

Adding to 13404225 its reverse (52240431), we get a palindrome (65644656).

It can be divided in two parts, 1340 and 4225, that added together give a triangular number (5565 = T₁₀₅).

The spelling of 13404225 in words is "thirteen million, four hundred four thousand, two hundred twenty-five".