27506261 has 2 divisors, whose sum is σ = 27506262. Its totient is φ = 27506260.

The previous prime is 27506257. The next prime is 27506263. The reversal of 27506261 is 16260572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16048036 + 11458225 = 4006^2 + 3385^2 .

It is a cyclic number.

It is not a de Polignac number, because 27506261 - 2² = 27506257 is a prime.

Together with 27506263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27506263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13753130 + 13753131.

It is an arithmetic number, because the mean of its divisors is an integer number (13753131).

Almost surely, 2^27506261 is an apocalyptic number.

It is an amenable number.

27506261 is a deficient number, since it is larger than the sum of its proper divisors (1).

27506261 is an equidigital number, since it uses as much as digits as its factorization.

27506261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 27506261 is about 5244.6411698037. The cubic root of 27506261 is about 301.8634420544.

The spelling of 27506261 in words is "twenty-seven million, five hundred six thousand, two hundred sixty-one".