2566897 has 2 divisors, whose sum is σ = 2566898. Its totient is φ = 2566896.

The previous prime is 2566867. The next prime is 2566909. The reversal of 2566897 is 7986652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2187441 + 379456 = 1479^2 + 616^2 .

It is a cyclic number.

It is not a de Polignac number, because 2566897 - 2¹⁹ = 2042609 is a prime.

It is a d-powerful number, because it can be written as 2¹⁴ + 5⁴ + 6⁶ + 6⁸ + 8² + 9 + 7⁷ .

2566897 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2566807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283448 + 1283449.

It is an arithmetic number, because the mean of its divisors is an integer number (1283449).

2^2566897 is an apocalyptic number.

It is an amenable number.

2566897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566897 is an equidigital number, since it uses as much as digits as its factorization.

2566897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

The square root of 2566897 is about 1602.1538627735. The cubic root of 2566897 is about 136.9208166574.

It can be divided in two parts, 25668 and 97, that multiplied together give a triangular number (2489796 = T₂₂₃₁).

The spelling of 2566897 in words is "two million, five hundred sixty-six thousand, eight hundred ninety-seven".