13545225 has 30 divisors (see below), whose sum is σ = 25094190. Its totient is φ = 7223040.

The previous prime is 13545199. The next prime is 13545227. The reversal of 13545225 is 52254531.

It is a happy number.

13545225 is a `hidden beast` number, since 135 + 4 + 522 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2396304 + 11148921 = 1548^2 + 3339^2 .

It is not a de Polignac number, because 13545225 - 2⁵ = 13545193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13545227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1320 + ... + 5369.

It is an arithmetic number, because the mean of its divisors is an integer number (836473).

Almost surely, 2^13545225 is an apocalyptic number.

13545225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13545225 is a deficient number, since it is larger than the sum of its proper divisors (11548965).

13545225 is an equidigital number, since it uses as much as digits as its factorization.

13545225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6711 (or 6697 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 13545225 is about 3680.3838115066. The cubic root of 13545225 is about 238.3757511126.

Adding to 13545225 its reverse (52254531), we get a palindrome (65799756).

The spelling of 13545225 in words is "thirteen million, five hundred forty-five thousand, two hundred twenty-five".