245718249 has 16 divisors (see below), whose sum is σ = 375070080. Its totient is φ = 140169600.

The previous prime is 245718233. The next prime is 245718259. The reversal of 245718249 is 942817542.

It is not a de Polignac number, because 245718249 - 2⁴ = 245718233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 245718249.

It is not an unprimeable number, because it can be changed into a prime (245718259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2887 + ... + 22355.

It is an arithmetic number, because the mean of its divisors is an integer number (23441880).

Almost surely, 2^245718249 is an apocalyptic number.

It is an amenable number.

245718249 is a deficient number, since it is larger than the sum of its proper divisors (129351831).

245718249 is a wasteful number, since it uses less digits than its factorization.

245718249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20080.

The product of its digits is 161280, while the sum is 42.

The square root of 245718249 is about 15675.4026742537. The cubic root of 245718249 is about 626.3433497364.

It can be divided in two parts, 2457 and 18249, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 245718249 in words is "two hundred forty-five million, seven hundred eighteen thousand, two hundred forty-nine".