2015771 has 2 divisors, whose sum is σ = 2015772. Its totient is φ = 2015770.

The previous prime is 2015753. The next prime is 2015777. The reversal of 2015771 is 1775102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2015771 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2015777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007885 + 1007886.

It is an arithmetic number, because the mean of its divisors is an integer number (1007886).

2^2015771 is an apocalyptic number.

2015771 is a deficient number, since it is larger than the sum of its proper divisors (1).

2015771 is an equidigital number, since it uses as much as digits as its factorization.

2015771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 2015771 is about 1419.7785038519. The cubic root of 2015771 is about 126.3224085500.

The spelling of 2015771 in words is "two million, fifteen thousand, seven hundred seventy-one".