27129225 has 12 divisors (see below), whose sum is σ = 44853776. Its totient is φ = 14468880.

The previous prime is 27129217. The next prime is 27129227. The reversal of 27129225 is 52292172.

It is not a de Polignac number, because 27129225 - 2³ = 27129217 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27129192 and 27129201.

It is not an unprimeable number, because it can be changed into a prime (27129227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180787 + ... + 180936.

Almost surely, 2^27129225 is an apocalyptic number.

27129225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27129225 is a deficient number, since it is larger than the sum of its proper divisors (17724551).

27129225 is a wasteful number, since it uses less digits than its factorization.

27129225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361736 (or 361731 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 27129225 is about 5208.5722611864. The cubic root of 27129225 is about 300.4778495729.

The spelling of 27129225 in words is "twenty-seven million, one hundred twenty-nine thousand, two hundred twenty-five".