251441 has 4 divisors (see below), whose sum is σ = 259584. Its totient is φ = 243300.

The previous prime is 251437. The next prime is 251443. The reversal of 251441 is 144152.

251441 is nontrivially palindromic in base 13.

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.

It is a cyclic number.

It is not a de Polignac number, because 251441 - 2² = 251437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (251443) 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, 4025 + ... + 4086.

It is an arithmetic number, because the mean of its divisors is an integer number (64896).

2²⁵¹⁴⁴¹ is an apocalyptic number.

It is an amenable number.

251441 is a deficient number, since it is larger than the sum of its proper divisors (8143).

251441 is an equidigital number, since it uses as much as digits as its factorization.

251441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8142.

The product of its digits is 160, while the sum is 17.

The square root of 251441 is about 501.4389294819. The cubic root of 251441 is about 63.1168571008.

Adding to 251441 its reverse (144152), we get a palindrome (395593).

The spelling of 251441 in words is "two hundred fifty-one thousand, four hundred forty-one".