2766521 has 2 divisors, whose sum is σ = 2766522. Its totient is φ = 2766520.

The previous prime is 2766493. The next prime is 2766539. The reversal of 2766521 is 1256672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2325625 + 440896 = 1525^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 2766521 - 2¹⁸ = 2504377 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2766551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1383260 + 1383261.

It is an arithmetic number, because the mean of its divisors is an integer number (1383261).

2^2766521 is an apocalyptic number.

It is an amenable number.

2766521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2766521 is an equidigital number, since it uses as much as digits as its factorization.

2766521 is an evil number, because the sum of its binary digits is even.

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

The square root of 2766521 is about 1663.2862050772. The cubic root of 2766521 is about 140.3819671214.

The spelling of 2766521 in words is "two million, seven hundred sixty-six thousand, five hundred twenty-one".