285725105 has 8 divisors (see below), whose sum is σ = 351233064. Its totient is φ = 223004800.

The previous prime is 285725101. The next prime is 285725117. The reversal of 285725105 is 501527582.

It can be written as a sum of positive squares in 4 ways, for example, as 21077281 + 264647824 = 4591^2 + 16268^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 285725105 - 2² = 285725101 is a prime.

It is a super-2 number, since 2×285725105² = 163277671254522050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285725101) 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 7 ways as a sum of consecutive naturals, for example, 696686 + ... + 697095.

It is an arithmetic number, because the mean of its divisors is an integer number (43904133).

Almost surely, 2^285725105 is an apocalyptic number.

It is an amenable number.

285725105 is a deficient number, since it is larger than the sum of its proper divisors (65507959).

285725105 is a wasteful number, since it uses less digits than its factorization.

285725105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393827.

The product of its (nonzero) digits is 28000, while the sum is 35.

The square root of 285725105 is about 16903.4051303280. The cubic root of 285725105 is about 658.6420695080.

The spelling of 285725105 in words is "two hundred eighty-five million, seven hundred twenty-five thousand, one hundred five".