245085569 has 2 divisors, whose sum is σ = 245085570. Its totient is φ = 245085568.

The previous prime is 245085559. The next prime is 245085611. The reversal of 245085569 is 965580542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130873600 + 114211969 = 11440^2 + 10687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245085569 is a prime.

It is a super-2 number, since 2×245085569² = 120133872264107522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (245085559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122542784 + 122542785.

It is an arithmetic number, because the mean of its divisors is an integer number (122542785).

Almost surely, 2^245085569 is an apocalyptic number.

It is an amenable number.

245085569 is a deficient number, since it is larger than the sum of its proper divisors (1).

245085569 is an equidigital number, since it uses as much as digits as its factorization.

245085569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432000, while the sum is 44.

The square root of 245085569 is about 15655.2090053119. The cubic root of 245085569 is about 625.8053141183.

The spelling of 245085569 in words is "two hundred forty-five million, eighty-five thousand, five hundred sixty-nine".