251238 has 16 divisors (see below), whose sum is σ = 541296. Its totient is φ = 77280.

The previous prime is 251233. The next prime is 251257. The reversal of 251238 is 832152.

251238 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251231) by changing a digit.

251238 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1533 + ... + 1688.

It is an arithmetic number, because the mean of its divisors is an integer number (33831).

2²⁵¹²³⁸ is an apocalyptic number.

251238 is an abundant number, since it is smaller than the sum of its proper divisors (290058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251238 is a wasteful number, since it uses less digits than its factorization.

251238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239.

The product of its digits is 480, while the sum is 21.

The square root of 251238 is about 501.2364711391. The cubic root of 251238 is about 63.0998668040.

The spelling of 251238 in words is "two hundred fifty-one thousand, two hundred thirty-eight".