245953 has 4 divisors (see below), whose sum is σ = 246960. Its totient is φ = 244948.

The previous prime is 245941. The next prime is 245963. The reversal of 245953 is 359542.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126 + ... + 712.

It is an arithmetic number, because the mean of its divisors is an integer number (61740).

2²⁴⁵⁹⁵³ is an apocalyptic number.

It is an amenable number.

245953 is a deficient number, since it is larger than the sum of its proper divisors (1007).

245953 is an equidigital number, since it uses as much as digits as its factorization.

245953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006.

The product of its digits is 5400, while the sum is 28.

The square root of 245953 is about 495.9364878692. The cubic root of 245953 is about 62.6542748749.

The spelling of 245953 in words is "two hundred forty-five thousand, nine hundred fifty-three".