13225985 has 16 divisors (see below), whose sum is σ = 16405200. Its totient is φ = 10229760.

The previous prime is 13225981. The next prime is 13225987. The reversal of 13225985 is 58952231.

It can be written as a sum of positive squares in 8 ways, for example, as 6713281 + 6512704 = 2591^2 + 2552^2 .

It is not a de Polignac number, because 13225985 - 2² = 13225981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13225981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30329 + ... + 30761.

It is an arithmetic number, because the mean of its divisors is an integer number (1025325).

It is a Proth number, since it is equal to 3229 ⋅ 2¹² + 1 and 3229 < 2¹².

Almost surely, 2^13225985 is an apocalyptic number.

It is an amenable number.

13225985 is a deficient number, since it is larger than the sum of its proper divisors (3179215).

13225985 is a wasteful number, since it uses less digits than its factorization.

13225985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628.

The product of its digits is 21600, while the sum is 35.

The square root of 13225985 is about 3636.7547346501. The cubic root of 13225985 is about 236.4881271538.

The spelling of 13225985 in words is "thirteen million, two hundred twenty-five thousand, nine hundred eighty-five".