285861049 has 4 divisors (see below), whose sum is σ = 287947764. Its totient is φ = 283774336.

The previous prime is 285860999. The next prime is 285861101. The reversal of 285861049 is 940168582.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 169911225 + 115949824 = 13035^2 + 10768^2 .

It is a cyclic number.

It is not a de Polignac number, because 285861049 - 2¹³ = 285852857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285860996 and 285861014.

It is not an unprimeable number, because it can be changed into a prime (285861449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043152 + ... + 1043425.

It is an arithmetic number, because the mean of its divisors is an integer number (71986941).

Almost surely, 2^285861049 is an apocalyptic number.

It is an amenable number.

285861049 is a deficient number, since it is larger than the sum of its proper divisors (2086715).

285861049 is a wasteful number, since it uses less digits than its factorization.

285861049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2086714.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 285861049 is about 16907.4258537484. The cubic root of 285861049 is about 658.7465105008.

The spelling of 285861049 in words is "two hundred eighty-five million, eight hundred sixty-one thousand, forty-nine".