400253 has 4 divisors (see below), whose sum is σ = 457440. Its totient is φ = 343068.

The previous prime is 400249. The next prime is 400261. The reversal of 400253 is 352004.

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 400253 - 2² = 400249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400243) 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, 28583 + ... + 28596.

It is an arithmetic number, because the mean of its divisors is an integer number (114360).

2⁴⁰⁰²⁵³ is an apocalyptic number.

It is an amenable number.

400253 is a deficient number, since it is larger than the sum of its proper divisors (57187).

400253 is an equidigital number, since it uses as much as digits as its factorization.

400253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57186.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 400253 is about 632.6555144785. The cubic root of 400253 is about 73.6961610316.

Adding to 400253 its reverse (352004), we get a palindrome (752257).

The spelling of 400253 in words is "four hundred thousand, two hundred fifty-three".