285146521 has 16 divisors (see below), whose sum is σ = 314854848. Its totient is φ = 256089600.

The previous prime is 285146497. The next prime is 285146549. The reversal of 285146521 is 125641582.

285146521 = 84² + 85² + ... + 949².

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 285146521 - 2⁵ = 285146489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285146581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 623725 + ... + 624181.

It is an arithmetic number, because the mean of its divisors is an integer number (19678428).

Almost surely, 2^285146521 is an apocalyptic number.

It is an amenable number.

285146521 is a deficient number, since it is larger than the sum of its proper divisors (29708327).

285146521 is a wasteful number, since it uses less digits than its factorization.

285146521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032.

The product of its digits is 19200, while the sum is 34.

The square root of 285146521 is about 16886.2820360197. The cubic root of 285146521 is about 658.1971928638.

The spelling of 285146521 in words is "two hundred eighty-five million, one hundred forty-six thousand, five hundred twenty-one".