13140225 has 84 divisors (see below), whose sum is σ = 28190656. Its totient is φ = 5948640.

The previous prime is 13140221. The next prime is 13140271. The reversal of 13140225 is 52204131.

It is not a de Polignac number, because 13140225 - 2² = 13140221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13140198 and 13140207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140221) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 127524 + ... + 127626.

Almost surely, 2^13140225 is an apocalyptic number.

13140225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13140225 is an abundant number, since it is smaller than the sum of its proper divisors (15050431).

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

13140225 is an equidigital number, since it uses as much as digits as its factorization.

13140225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 13140225 is about 3624.9448271663. The cubic root of 13140225 is about 235.9758725214.

Adding to 13140225 its reverse (52204131), we get a palindrome (65344356).

The spelling of 13140225 in words is "thirteen million, one hundred forty thousand, two hundred twenty-five".