245291 has 2 divisors, whose sum is σ = 245292. Its totient is φ = 245290.

The previous prime is 245279. The next prime is 245299. The reversal of 245291 is 192542.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245291 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (245299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122645 + 122646.

It is an arithmetic number, because the mean of its divisors is an integer number (122646).

2²⁴⁵²⁹¹ is an apocalyptic number.

245291 is a deficient number, since it is larger than the sum of its proper divisors (1).

245291 is an equidigital number, since it uses as much as digits as its factorization.

245291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 245291 is about 495.2686139864. The cubic root of 245291 is about 62.5980115528.

The spelling of 245291 in words is "two hundred forty-five thousand, two hundred ninety-one".