245811249 has 12 divisors (see below), whose sum is σ = 356054400. Its totient is φ = 163415544.

The previous prime is 245811233. The next prime is 245811283. The reversal of 245811249 is 942118542.

245811249 is a `hidden beast` number, since 24 + 581 + 12 + 49 = 666.

It is not a de Polignac number, because 245811249 - 2⁴ = 245811233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245811229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34809 + ... + 41270.

It is an arithmetic number, because the mean of its divisors is an integer number (29671200).

Almost surely, 2^245811249 is an apocalyptic number.

It is an amenable number.

245811249 is a deficient number, since it is larger than the sum of its proper divisors (110243151).

245811249 is a wasteful number, since it uses less digits than its factorization.

245811249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76444 (or 76441 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 245811249 is about 15678.3688245940. The cubic root of 245811249 is about 626.4223597197.

The spelling of 245811249 in words is "two hundred forty-five million, eight hundred eleven thousand, two hundred forty-nine".