612591 has 16 divisors (see below), whose sum is σ = 964608. Its totient is φ = 338400.

The previous prime is 612589. The next prime is 612611. The reversal of 612591 is 195216.

It is not a de Polignac number, because 612591 - 2¹ = 612589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181 + ... + 1121.

It is an arithmetic number, because the mean of its divisors is an integer number (60288).

2⁶¹²⁵⁹¹ is an apocalyptic number.

612591 is a deficient number, since it is larger than the sum of its proper divisors (352017).

612591 is a wasteful number, since it uses less digits than its factorization.

612591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982.

The product of its digits is 540, while the sum is 24.

The square root of 612591 is about 782.6819277331. The cubic root of 612591 is about 84.9291682115.

It can be divided in two parts, 6125 and 91, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 612591 in words is "six hundred twelve thousand, five hundred ninety-one".