2564197 has 4 divisors (see below), whose sum is σ = 2567500. Its totient is φ = 2560896.

The previous prime is 2564171. The next prime is 2564203. The reversal of 2564197 is 7914652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1185921 + 1378276 = 1089^2 + 1174^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564197 - 2¹⁹ = 2039909 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564117) 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, 223 + ... + 2275.

It is an arithmetic number, because the mean of its divisors is an integer number (641875).

2^2564197 is an apocalyptic number.

It is an amenable number.

2564197 is a deficient number, since it is larger than the sum of its proper divisors (3303).

2564197 is a wasteful number, since it uses less digits than its factorization.

2564197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3302.

The product of its digits is 15120, while the sum is 34.

The square root of 2564197 is about 1601.3110253789. The cubic root of 2564197 is about 136.8727929281.

The spelling of 2564197 in words is "two million, five hundred sixty-four thousand, one hundred ninety-seven".