2569641 has 4 divisors (see below), whose sum is σ = 3426192. Its totient is φ = 1713092.

The previous prime is 2569607. The next prime is 2569649. The reversal of 2569641 is 1469652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2569641 - 2⁶ = 2569577 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2569649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428271 + ... + 428276.

It is an arithmetic number, because the mean of its divisors is an integer number (856548).

2^2569641 is an apocalyptic number.

It is an amenable number.

2569641 is a deficient number, since it is larger than the sum of its proper divisors (856551).

2569641 is an equidigital number, since it uses as much as digits as its factorization.

2569641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856550.

The product of its digits is 12960, while the sum is 33.

The square root of 2569641 is about 1603.0099812540. The cubic root of 2569641 is about 136.9695885043.

The spelling of 2569641 in words is "two million, five hundred sixty-nine thousand, six hundred forty-one".