253581 has 8 divisors (see below), whose sum is σ = 340704. Its totient is φ = 167760.

The previous prime is 253573. The next prime is 253601. The reversal of 253581 is 185352.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253581 - 2³ = 253573 is a prime.

It is a super-2 number, since 2×253581² = 128606647122, which contains 22 as substring.

It is a Curzon 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310 + ... + 776.

It is an arithmetic number, because the mean of its divisors is an integer number (42588).

2²⁵³⁵⁸¹ is an apocalyptic number.

It is an amenable number.

253581 is a deficient number, since it is larger than the sum of its proper divisors (87123).

253581 is a wasteful number, since it uses less digits than its factorization.

253581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651.

The product of its digits is 1200, while the sum is 24.

The square root of 253581 is about 503.5682674673. The cubic root of 253581 is about 63.2954128184.

The spelling of 253581 in words is "two hundred fifty-three thousand, five hundred eighty-one".