253857 has 8 divisors (see below), whose sum is σ = 347776. Its totient is φ = 164592.

The previous prime is 253853. The next prime is 253867. The reversal of 253857 is 758352.

253857 = T₂₃₃ + T₂₃₄ + ... + T₂₄₁.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 253857 - 2² = 253853 is a prime.

It is a Duffinian number.

253857 is a lucky number.

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 7 ways as a sum of consecutive naturals, for example, 1033 + ... + 1254.

It is an arithmetic number, because the mean of its divisors is an integer number (43472).

2²⁵³⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

253857 is a deficient number, since it is larger than the sum of its proper divisors (93919).

253857 is a wasteful number, since it uses less digits than its factorization.

253857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327.

The product of its digits is 8400, while the sum is 30.

The square root of 253857 is about 503.8422372132. The cubic root of 253857 is about 63.3183682709.

The spelling of 253857 in words is "two hundred fifty-three thousand, eight hundred fifty-seven".