27275261 has 4 divisors (see below), whose sum is σ = 29373372. Its totient is φ = 25177152.

The previous prime is 27275249. The next prime is 27275273. The reversal of 27275261 is 16257272.

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

It is an interprime number because it is at equal distance from previous prime (27275249) and next prime (27275273).

It can be written as a sum of positive squares in 2 ways, for example, as 11323225 + 15952036 = 3365^2 + 3994^2 .

It is a de Polignac number, because none of the positive numbers 2^k-27275261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27275221) 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, 1049036 + ... + 1049061.

It is an arithmetic number, because the mean of its divisors is an integer number (7343343).

Almost surely, 2^27275261 is an apocalyptic number.

It is an amenable number.

27275261 is a deficient number, since it is larger than the sum of its proper divisors (2098111).

27275261 is a wasteful number, since it uses less digits than its factorization.

27275261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098110.

The product of its digits is 11760, while the sum is 32.

The square root of 27275261 is about 5222.5722589544. The cubic root of 27275261 is about 301.0160401749.

The spelling of 27275261 in words is "twenty-seven million, two hundred seventy-five thousand, two hundred sixty-one".