4287321 has 6 divisors (see below), whose sum is σ = 6192810. Its totient is φ = 2858208.

The previous prime is 4287319. The next prime is 4287337. The reversal of 4287321 is 1237824.

It can be written as a sum of positive squares in only one way, i.e., 4260096 + 27225 = 2064^2 + 165^2 .

It is not a de Polignac number, because 4287321 - 2¹ = 4287319 is a prime.

It is a super-2 number, since 2×4287321² = 36762242714082, which contains 22 as substring.

It is a d-powerful number, because it can be written as 4² + 2¹⁶ + 8⁴ + 7⁵ + 3⁸ + 2²² + 1 .

It is not an unprimeable number, because it can be changed into a prime (4287341) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 238176 + ... + 238193.

It is an arithmetic number, because the mean of its divisors is an integer number (1032135).

Almost surely, 2^4287321 is an apocalyptic number.

It is an amenable number.

4287321 is a deficient number, since it is larger than the sum of its proper divisors (1905489).

4287321 is a wasteful number, since it uses less digits than its factorization.

4287321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476375 (or 476372 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 4287321 is about 2070.5847000304. The cubic root of 4287321 is about 162.4533483439.

The spelling of 4287321 in words is "four million, two hundred eighty-seven thousand, three hundred twenty-one".