27245261 has 2 divisors, whose sum is σ = 27245262. Its totient is φ = 27245260.

The previous prime is 27245227. The next prime is 27245269. The reversal of 27245261 is 16254272.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17598025 + 9647236 = 4195^2 + 3106^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27245261 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27245269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13622630 + 13622631.

It is an arithmetic number, because the mean of its divisors is an integer number (13622631).

Almost surely, 2^27245261 is an apocalyptic number.

It is an amenable number.

27245261 is a deficient number, since it is larger than the sum of its proper divisors (1).

27245261 is an equidigital number, since it uses as much as digits as its factorization.

27245261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 29.

The square root of 27245261 is about 5219.6993208421. The cubic root of 27245261 is about 300.9056373927.

The spelling of 27245261 in words is "twenty-seven million, two hundred forty-five thousand, two hundred sixty-one".