245778247 has 16 divisors (see below), whose sum is σ = 293650560. Its totient is φ = 202744800.

The previous prime is 245778241. The next prime is 245778259. The reversal of 245778247 is 742877542.

It is a cyclic number.

It is not a de Polignac number, because 245778247 - 2¹¹ = 245776199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245778197 and 245778206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245778241) 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, 6129 + ... + 23002.

It is an arithmetic number, because the mean of its divisors is an integer number (18353160).

Almost surely, 2^245778247 is an apocalyptic number.

245778247 is a deficient number, since it is larger than the sum of its proper divisors (47872313).

245778247 is a wasteful number, since it uses less digits than its factorization.

245778247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29214.

The product of its digits is 878080, while the sum is 46.

The square root of 245778247 is about 15677.3163200849. The cubic root of 245778247 is about 626.3943245015.

The spelling of 245778247 in words is "two hundred forty-five million, seven hundred seventy-eight thousand, two hundred forty-seven".