27405225 has 27 divisors (see below), whose sum is σ = 49226853. Its totient is φ = 14574240.

The previous prime is 27405199. The next prime is 27405229. The reversal of 27405225 is 52250472.

The square root of 27405225 is 5235.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 281961 + 27123264 = 531^2 + 5208^2 .

It is not a de Polignac number, because 27405225 - 2⁵ = 27405193 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27405229) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 78351 + ... + 78699.

Almost surely, 2^27405225 is an apocalyptic number.

27405225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27405225 is the 5235-th square number.

27405225 is the 2618-th centered octagonal number.

It is an amenable number.

27405225 is a deficient number, since it is larger than the sum of its proper divisors (21821628).

27405225 is an equidigital number, since it uses as much as digits as its factorization.

27405225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The cubic root of 27405225 is about 301.4933869823.

Adding to 27405225 its reverse (52250472), we get a palindrome (79655697).

The spelling of 27405225 in words is "twenty-seven million, four hundred five thousand, two hundred twenty-five".