2564815 has 8 divisors (see below), whose sum is σ = 3357648. Its totient is φ = 1865280.

The previous prime is 2564813. The next prime is 2564819. The reversal of 2564815 is 5184652.

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

It is not a de Polignac number, because 2564815 - 2¹ = 2564813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564813) 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, 23262 + ... + 23371.

It is an arithmetic number, because the mean of its divisors is an integer number (419706).

2^2564815 is an apocalyptic number.

2564815 is a deficient number, since it is larger than the sum of its proper divisors (792833).

2564815 is a wasteful number, since it uses less digits than its factorization.

2564815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46649.

The product of its digits is 9600, while the sum is 31.

The square root of 2564815 is about 1601.5039806382. The cubic root of 2564815 is about 136.8837880001.

The spelling of 2564815 in words is "two million, five hundred sixty-four thousand, eight hundred fifteen".