27121057 has 2 divisors, whose sum is σ = 27121058. Its totient is φ = 27121056.

The previous prime is 27121051. The next prime is 27121067. The reversal of 27121057 is 75012172.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16072081 + 11048976 = 4009^2 + 3324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27121057 is a prime.

It is not a weakly prime, because it can be changed into another prime (27121051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13560528 + 13560529.

It is an arithmetic number, because the mean of its divisors is an integer number (13560529).

Almost surely, 2^27121057 is an apocalyptic number.

It is an amenable number.

27121057 is a deficient number, since it is larger than the sum of its proper divisors (1).

27121057 is an equidigital number, since it uses as much as digits as its factorization.

27121057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 27121057 is about 5207.7881101289. The cubic root of 27121057 is about 300.4476908366.

The spelling of 27121057 in words is "twenty-seven million, one hundred twenty-one thousand, fifty-seven".