2591566 has 4 divisors (see below), whose sum is σ = 3887352. Its totient is φ = 1295782.

The previous prime is 2591551. The next prime is 2591579. The reversal of 2591566 is 6651952.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 647890 + ... + 647893.

It is an arithmetic number, because the mean of its divisors is an integer number (971838).

2^2591566 is an apocalyptic number.

2591566 is a deficient number, since it is larger than the sum of its proper divisors (1295786).

2591566 is a wasteful number, since it uses less digits than its factorization.

2591566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295785.

The product of its digits is 16200, while the sum is 34.

The square root of 2591566 is about 1609.8341529487. The cubic root of 2591566 is about 137.3580419195.

The spelling of 2591566 in words is "two million, five hundred ninety-one thousand, five hundred sixty-six".