251041 has 4 divisors (see below), whose sum is σ = 286912. Its totient is φ = 215172.

The previous prime is 251033. The next prime is 251051. The reversal of 251041 is 140152.

251041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 251041 - 2³ = 251033 is a prime.

It is a Duffinian number.

251041 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (251051) 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, 17925 + ... + 17938.

It is an arithmetic number, because the mean of its divisors is an integer number (71728).

2²⁵¹⁰⁴¹ is an apocalyptic number.

It is an amenable number.

251041 is a deficient number, since it is larger than the sum of its proper divisors (35871).

251041 is an equidigital number, since it uses as much as digits as its factorization.

251041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35870.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 251041 is about 501.0399185694. The cubic root of 251041 is about 63.0833699309.

Subtracting from 251041 its product of nonzero digits (40), we obtain a square (251001 = 501²).

Adding to 251041 its reverse (140152), we get a palindrome (391193).

Subtracting from 251041 its reverse (140152), we obtain a square (110889 = 333²).

The spelling of 251041 in words is "two hundred fifty-one thousand, forty-one".