253591 has 4 divisors (see below), whose sum is σ = 273112. Its totient is φ = 234072.

The previous prime is 253573. The next prime is 253601. The reversal of 253591 is 195352.

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 253591 - 2¹¹ = 251543 is a prime.

It is a Duffinian number.

253591 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253501) 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 3 ways as a sum of consecutive naturals, for example, 9741 + ... + 9766.

It is an arithmetic number, because the mean of its divisors is an integer number (68278).

2²⁵³⁵⁹¹ is an apocalyptic number.

253591 is a deficient number, since it is larger than the sum of its proper divisors (19521).

253591 is a wasteful number, since it uses less digits than its factorization.

253591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19520.

The product of its digits is 1350, while the sum is 25.

The square root of 253591 is about 503.5781965097. The cubic root of 253591 is about 63.2962448285.

The spelling of 253591 in words is "two hundred fifty-three thousand, five hundred ninety-one".