285255145 has 16 divisors (see below), whose sum is σ = 391587840. Its totient is φ = 195413184.

The previous prime is 285255137. The next prime is 285255161. The reversal of 285255145 is 541552582.

It is a cyclic number.

It is not a de Polignac number, because 285255145 - 2³ = 285255137 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39096 + ... + 45814.

It is an arithmetic number, because the mean of its divisors is an integer number (24474240).

Almost surely, 2^285255145 is an apocalyptic number.

It is an amenable number.

285255145 is a deficient number, since it is larger than the sum of its proper divisors (106332695).

285255145 is a wasteful number, since it uses less digits than its factorization.

285255145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7944.

The product of its digits is 80000, while the sum is 37.

The square root of 285255145 is about 16889.4980683264. The cubic root of 285255145 is about 658.2807603516.

It can be divided in two parts, 28525 and 5145, that added together give a triangular number (33670 = T₂₅₉).

The spelling of 285255145 in words is "two hundred eighty-five million, two hundred fifty-five thousand, one hundred forty-five".