2564309 has 8 divisors (see below), whose sum is σ = 2823552. Its totient is φ = 2309440.

The previous prime is 2564279. The next prime is 2564321. The reversal of 2564309 is 9034652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2564309 - 2⁸ = 2564053 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212 + ... + 2274.

It is an arithmetic number, because the mean of its divisors is an integer number (352944).

2^2564309 is an apocalyptic number.

It is an amenable number.

2564309 is a deficient number, since it is larger than the sum of its proper divisors (259243).

2564309 is a wasteful number, since it uses less digits than its factorization.

2564309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2187.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 2564309 is about 1601.3459963418. The cubic root of 2564309 is about 136.8747856936.

The spelling of 2564309 in words is "two million, five hundred sixty-four thousand, three hundred nine".