3285729 has 12 divisors (see below), whose sum is σ = 4910100. Its totient is φ = 2114784.

The previous prime is 3285719. The next prime is 3285739. The reversal of 3285729 is 9275823.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3285719) and next prime (3285739).

It can be written as a sum of positive squares in 2 ways, for example, as 898704 + 2387025 = 948^2 + 1545^2 .

It is not a de Polignac number, because 3285729 - 2⁴ = 3285713 is a prime.

It is a super-2 number, since 2×3285729² = 21592030122882, which contains 22 as substring.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 3285693 and 3285702.

It is not an unprimeable number, because it can be changed into a prime (3285719) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6034 + ... + 6555.

It is an arithmetic number, because the mean of its divisors is an integer number (409175).

Almost surely, 2^3285729 is an apocalyptic number.

It is an amenable number.

3285729 is a deficient number, since it is larger than the sum of its proper divisors (1624371).

3285729 is a wasteful number, since it uses less digits than its factorization.

3285729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12624 (or 12621 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 3285729 is about 1812.6579931140. The cubic root of 3285729 is about 148.6656316050.

The spelling of 3285729 in words is "three million, two hundred eighty-five thousand, seven hundred twenty-nine".