253851 has 16 divisors (see below), whose sum is σ = 381696. Its totient is φ = 148896.

The previous prime is 253823. The next prime is 253853. The reversal of 253851 is 158352.

It is not a de Polignac number, because 253851 - 2⁵ = 253819 is a prime.

253851 is a modest number, since divided by 851 gives 253 as remainder.

It is not an unprimeable number, because it can be changed into a prime (253853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756 + ... + 1038.

It is an arithmetic number, because the mean of its divisors is an integer number (23856).

2²⁵³⁸⁵¹ is an apocalyptic number.

253851 is a deficient number, since it is larger than the sum of its proper divisors (127845).

253851 is a wasteful number, since it uses less digits than its factorization.

253851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322.

The product of its digits is 1200, while the sum is 24.

The square root of 253851 is about 503.8362829333. The cubic root of 253851 is about 63.3178694163.

The spelling of 253851 in words is "two hundred fifty-three thousand, eight hundred fifty-one".