2642569 has 2 divisors, whose sum is σ = 2642570. Its totient is φ = 2642568.

The previous prime is 2642561. The next prime is 2642587. The reversal of 2642569 is 9652462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2064969 + 577600 = 1437^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 2642569 - 2³ = 2642561 is a prime.

It is a super-2 number, since 2×2642569² = 13966341839522, which contains 22 as substring.

2642569 is a lucky number.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (2642561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1321284 + 1321285.

It is an arithmetic number, because the mean of its divisors is an integer number (1321285).

2^2642569 is an apocalyptic number.

It is an amenable number.

2642569 is a deficient number, since it is larger than the sum of its proper divisors (1).

2642569 is an equidigital number, since it uses as much as digits as its factorization.

2642569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 2642569 is about 1625.5980437980. The cubic root of 2642569 is about 138.2532805646.

The spelling of 2642569 in words is "two million, six hundred forty-two thousand, five hundred sixty-nine".