251862 has 16 divisors (see below), whose sum is σ = 542640. Its totient is φ = 77472.

The previous prime is 251861. The next prime is 251879. The reversal of 251862 is 268152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1537 + ... + 1692.

It is an arithmetic number, because the mean of its divisors is an integer number (33915).

2²⁵¹⁸⁶² is an apocalyptic number.

251862 is an abundant number, since it is smaller than the sum of its proper divisors (290778).

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

251862 is a wasteful number, since it uses less digits than its factorization.

251862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247.

The product of its digits is 960, while the sum is 24.

The square root of 251862 is about 501.8585458075. The cubic root of 251862 is about 63.1520640085.

Subtracting 251862 from its reverse (268152), we obtain a triangular number (16290 = T₁₈₀).

The spelling of 251862 in words is "two hundred fifty-one thousand, eight hundred sixty-two".