2591247 has 4 divisors (see below), whose sum is σ = 3455000. Its totient is φ = 1727496.

The previous prime is 2591243. The next prime is 2591261. The reversal of 2591247 is 7421952.

2591247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2591247 - 2² = 2591243 is a prime.

It is a super-2 number, since 2×2591247² = 13429122030018, which contains 22 as substring.

It is a D-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 (2591243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431872 + ... + 431877.

It is an arithmetic number, because the mean of its divisors is an integer number (863750).

2^2591247 is an apocalyptic number.

2591247 is a deficient number, since it is larger than the sum of its proper divisors (863753).

2591247 is an equidigital number, since it uses as much as digits as its factorization.

2591247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863752.

The product of its digits is 5040, while the sum is 30.

The square root of 2591247 is about 1609.7350713704. The cubic root of 2591247 is about 137.3524058146.

The spelling of 2591247 in words is "two million, five hundred ninety-one thousand, two hundred forty-seven".