253261 has 4 divisors (see below), whose sum is σ = 254272. Its totient is φ = 252252.
The previous prime is 253247. The next prime is 253273. The reversal of 253261 is 162352.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.
It is a cyclic number.
It is not a de Polignac number, because 253261 - 25 = 253229 is a prime.
It is a super-3 number, since 3×2532613 = 48733343305855743, which contains 333 as substring. Note that it is a super-d number also for d = 2.
It is a Duffinian number.
253261 is a lucky number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (253361) 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, 190 + ... + 736.
It is an arithmetic number, because the mean of its divisors is an integer number (63568).
2253261 is an apocalyptic number.
It is an amenable number.
253261 is a deficient number, since it is larger than the sum of its proper divisors (1011).
253261 is an equidigital number, since it uses as much as digits as its factorization.
253261 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1010.
The product of its digits is 360, while the sum is 19.
The square root of 253261 is about 503.2504346744. The cubic root of 253261 is about 63.2687769401.
Subtracting from 253261 its reverse (162352), we obtain a palindrome (90909).
The spelling of 253261 in words is "two hundred fifty-three thousand, two hundred sixty-one".
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