245951 has 4 divisors (see below), whose sum is σ = 251232. Its totient is φ = 240672.

The previous prime is 245941. The next prime is 245963. The reversal of 245951 is 159542.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245951 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2570 + ... + 2663.

It is an arithmetic number, because the mean of its divisors is an integer number (62808).

2²⁴⁵⁹⁵¹ is an apocalyptic number.

245951 is a deficient number, since it is larger than the sum of its proper divisors (5281).

245951 is an equidigital number, since it uses as much as digits as its factorization.

245951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5280.

The product of its digits is 1800, while the sum is 26.

The square root of 245951 is about 495.9344714778. The cubic root of 245951 is about 62.6541050472.

The spelling of 245951 in words is "two hundred forty-five thousand, nine hundred fifty-one".