245781873 has 24 divisors (see below), whose sum is σ = 369083520. Its totient is φ = 157419360.

The previous prime is 245781863. The next prime is 245781901. The reversal of 245781873 is 378187542.

245781873 is a `hidden beast` number, since 2 + 4 + 578 + 1 + 8 + 73 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-245781873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245781863) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52840 + ... + 57302.

It is an arithmetic number, because the mean of its divisors is an integer number (15378480).

Almost surely, 2^245781873 is an apocalyptic number.

It is an amenable number.

245781873 is a deficient number, since it is larger than the sum of its proper divisors (123301647).

245781873 is a wasteful number, since it uses less digits than its factorization.

245781873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4709 (or 4706 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 245781873 is about 15677.4319644513. The cubic root of 245781873 is about 626.3974049133.

The spelling of 245781873 in words is "two hundred forty-five million, seven hundred eighty-one thousand, eight hundred seventy-three".