2564943 has 16 divisors (see below), whose sum is σ = 3813120. Its totient is φ = 1524096.

The previous prime is 2564921. The next prime is 2564957. The reversal of 2564943 is 3494652.

It is not a de Polignac number, because 2564943 - 2¹² = 2560847 is a prime.

It is a d-powerful number, because it can be written as 2⁵ + 5⁹ + 6⁷ + 4⁶ + 9⁴ + 4⁹ + 3¹⁰ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355 + ... + 2292.

It is an arithmetic number, because the mean of its divisors is an integer number (238320).

2^2564943 is an apocalyptic number.

2564943 is a deficient number, since it is larger than the sum of its proper divisors (1248177).

2564943 is a wasteful number, since it uses less digits than its factorization.

2564943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2686.

The product of its digits is 25920, while the sum is 33.

The square root of 2564943 is about 1601.5439425754. The cubic root of 2564943 is about 136.8860650757.

The spelling of 2564943 in words is "two million, five hundred sixty-four thousand, nine hundred forty-three".