2566481 has 2 divisors, whose sum is σ = 2566482. Its totient is φ = 2566480.

The previous prime is 2566469. The next prime is 2566489. The reversal of 2566481 is 1846652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2076481 + 490000 = 1441^2 + 700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2566481 is a prime.

It is a super-2 number, since 2×2566481² = 13173649446722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2566489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283240 + 1283241.

It is an arithmetic number, because the mean of its divisors is an integer number (1283241).

2^2566481 is an apocalyptic number.

It is an amenable number.

2566481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2566481 is an equidigital number, since it uses as much as digits as its factorization.

2566481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 32.

The square root of 2566481 is about 1602.0240322792. The cubic root of 2566481 is about 136.9134196410.

The spelling of 2566481 in words is "two million, five hundred sixty-six thousand, four hundred eighty-one".