245849985 has 20 divisors (see below), whose sum is σ = 440709588. Its totient is φ = 131119776.

The previous prime is 245849983. The next prime is 245849999. The reversal of 245849985 is 589948542.

It is a happy number.

245849985 is a `hidden beast` number, since 24 + 58 + 499 + 85 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 193098816 + 52751169 = 13896^2 + 7263^2 .

It is not a de Polignac number, because 245849985 - 2¹ = 245849983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245849983) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 303114 + ... + 303923.

Almost surely, 2^245849985 is an apocalyptic number.

It is an amenable number.

245849985 is a deficient number, since it is larger than the sum of its proper divisors (194859603).

245849985 is an equidigital number, since it uses as much as digits as its factorization.

245849985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607054 (or 607045 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 54.

The square root of 245849985 is about 15679.6041085226. The cubic root of 245849985 is about 626.4552627732.

The spelling of 245849985 in words is "two hundred forty-five million, eight hundred forty-nine thousand, nine hundred eighty-five".