2591611 has 4 divisors (see below), whose sum is σ = 2827224. Its totient is φ = 2356000.

The previous prime is 2591609. The next prime is 2591623. The reversal of 2591611 is 1161952.

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

It is a cyclic number.

It is not a de Polignac number, because 2591611 - 2¹ = 2591609 is a prime.

It is a Duffinian number.

2591611 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2591681) 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, 117790 + ... + 117811.

It is an arithmetic number, because the mean of its divisors is an integer number (706806).

2^2591611 is an apocalyptic number.

2591611 is the 861-st centered heptagonal number.

2591611 is a deficient number, since it is larger than the sum of its proper divisors (235613).

2591611 is a wasteful number, since it uses less digits than its factorization.

2591611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235612.

The product of its digits is 540, while the sum is 25.

The square root of 2591611 is about 1609.8481294830. The cubic root of 2591611 is about 137.3588369441.

The spelling of 2591611 in words is "two million, five hundred ninety-one thousand, six hundred eleven".