27045261 has 24 divisors (see below), whose sum is σ = 40407224. Its totient is φ = 17418240.

The previous prime is 27045253. The next prime is 27045311. The reversal of 27045261 is 16254072.

It can be written as a sum of positive squares in 4 ways, for example, as 9455625 + 17589636 = 3075^2 + 4194^2 .

It is not a de Polignac number, because 27045261 - 2³ = 27045253 is a prime.

It is a super-2 number, since 2×27045261² = 1462892285116242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27045241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80085 + ... + 80421.

Almost surely, 2^27045261 is an apocalyptic number.

It is an amenable number.

27045261 is a deficient number, since it is larger than the sum of its proper divisors (13361963).

27045261 is a wasteful number, since it uses less digits than its factorization.

27045261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 27045261 is about 5200.5058407813. The cubic root of 27045261 is about 300.1675397507.

The spelling of 27045261 in words is "twenty-seven million, forty-five thousand, two hundred sixty-one".