253745 has 8 divisors (see below), whose sum is σ = 320640. Its totient is φ = 192240.

The previous prime is 253741. The next prime is 253751. The reversal of 253745 is 547352.

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

It is not a de Polignac number, because 253745 - 2² = 253741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253741) 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, 1241 + ... + 1430.

It is an arithmetic number, because the mean of its divisors is an integer number (40080).

2²⁵³⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

253745 is a deficient number, since it is larger than the sum of its proper divisors (66895).

253745 is a wasteful number, since it uses less digits than its factorization.

253745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2695.

The product of its digits is 4200, while the sum is 26.

The square root of 253745 is about 503.7310790491. The cubic root of 253745 is about 63.3090550218.

The spelling of 253745 in words is "two hundred fifty-three thousand, seven hundred forty-five".