285172245 has 40 divisors (see below), whose sum is σ = 512439840. Its totient is φ = 151722720.

The previous prime is 285172243. The next prime is 285172271. The reversal of 285172245 is 542271582.

It is a happy number.

It is not a de Polignac number, because 285172245 - 2¹ = 285172243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285172241) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 279346 + ... + 280364.

It is an arithmetic number, because the mean of its divisors is an integer number (12810996).

Almost surely, 2^285172245 is an apocalyptic number.

It is an amenable number.

285172245 is a deficient number, since it is larger than the sum of its proper divisors (227267595).

285172245 is a wasteful number, since it uses less digits than its factorization.

285172245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727 (or 1718 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 285172245 is about 16887.0437021996. The cubic root of 285172245 is about 658.2169849756.

The spelling of 285172245 in words is "two hundred eighty-five million, one hundred seventy-two thousand, two hundred forty-five".