253405 has 8 divisors (see below), whose sum is σ = 309600. Its totient is φ = 199056.

The previous prime is 253387. The next prime is 253417. The reversal of 253405 is 504352.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 253405 - 2⁹ = 252893 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135 + ... + 724.

It is an arithmetic number, because the mean of its divisors is an integer number (38700).

2²⁵³⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

253405 is a deficient number, since it is larger than the sum of its proper divisors (56195).

253405 is an equidigital number, since it uses as much as digits as its factorization.

253405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 253405 is about 503.3934842645. The cubic root of 253405 is about 63.2807658602.

Adding to 253405 its reverse (504352), we get a palindrome (757757).

The spelling of 253405 in words is "two hundred fifty-three thousand, four hundred five".