285173245 has 48 divisors (see below), whose sum is σ = 414843264. Its totient is φ = 184204800.

The previous prime is 285173243. The next prime is 285173257. The reversal of 285173245 is 542371582.

It is not a de Polignac number, because 285173245 - 2¹ = 285173243 is a prime.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285173243) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2176830 + ... + 2176960.

It is an arithmetic number, because the mean of its divisors is an integer number (8642568).

Almost surely, 2^285173245 is an apocalyptic number.

It is an amenable number.

285173245 is a deficient number, since it is larger than the sum of its proper divisors (129670019).

285173245 is a wasteful number, since it uses less digits than its factorization.

285173245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 221 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 285173245 is about 16887.0733106717. The cubic root of 285173245 is about 658.2177543542.

The spelling of 285173245 in words is "two hundred eighty-five million, one hundred seventy-three thousand, two hundred forty-five".