2591643 has 8 divisors (see below), whose sum is σ = 3574800. Its totient is φ = 1668128.

The previous prime is 2591623. The next prime is 2591669. The reversal of 2591643 is 3461952.

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 2591643 - 2⁶ = 2591579 is a prime.

It is a super-2 number, since 2×2591643² = 13433226878898, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2591643.

It is not an unprimeable number, because it can be changed into a prime (2591623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14808 + ... + 14981.

It is an arithmetic number, because the mean of its divisors is an integer number (446850).

2^2591643 is an apocalyptic number.

2591643 is a deficient number, since it is larger than the sum of its proper divisors (983157).

2591643 is a wasteful number, since it uses less digits than its factorization.

2591643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29821.

The product of its digits is 6480, while the sum is 30.

The square root of 2591643 is about 1609.8580682781. The cubic root of 2591643 is about 137.3594022893.

The spelling of 2591643 in words is "two million, five hundred ninety-one thousand, six hundred forty-three".