27135257 has 4 divisors (see below), whose sum is σ = 27167076. Its totient is φ = 27103440.

The previous prime is 27135253. The next prime is 27135259. The reversal of 27135257 is 75253172.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15649936 + 11485321 = 3956^2 + 3389^2 .

It is a cyclic number.

It is not a de Polignac number, because 27135257 - 2² = 27135253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27135253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14594 + ... + 16347.

It is an arithmetic number, because the mean of its divisors is an integer number (6791769).

Almost surely, 2^27135257 is an apocalyptic number.

It is an amenable number.

27135257 is a deficient number, since it is larger than the sum of its proper divisors (31819).

27135257 is an equidigital number, since it uses as much as digits as its factorization.

27135257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31818.

The product of its digits is 14700, while the sum is 32.

The square root of 27135257 is about 5209.1512744400. The cubic root of 27135257 is about 300.5001176630.

The spelling of 27135257 in words is "twenty-seven million, one hundred thirty-five thousand, two hundred fifty-seven".