13161225 has 96 divisors (see below), whose sum is σ = 28283904. Its totient is φ = 5241600.

The previous prime is 13161193. The next prime is 13161229. The reversal of 13161225 is 52216131.

It is not a de Polignac number, because 13161225 - 2⁵ = 13161193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (13161229) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 248299 + ... + 248351.

It is an arithmetic number, because the mean of its divisors is an integer number (294624).

Almost surely, 2^13161225 is an apocalyptic number.

13161225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13161225 is an abundant number, since it is smaller than the sum of its proper divisors (15122679).

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

13161225 is a wasteful number, since it uses less digits than its factorization.

13161225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 122 counting only the distinct ones).

The product of its digits is 360, while the sum is 21.

The square root of 13161225 is about 3627.8402666049. The cubic root of 13161225 is about 236.1015135917.

Adding to 13161225 its reverse (52216131), we get a palindrome (65377356).

The spelling of 13161225 in words is "thirteen million, one hundred sixty-one thousand, two hundred twenty-five".