4512321 has 16 divisors (see below), whose sum is σ = 7293120. Its totient is φ = 2734560.

The previous prime is 4512317. The next prime is 4512331. The reversal of 4512321 is 1232154.

It is not a de Polignac number, because 4512321 - 2² = 4512317 is a prime.

It is a super-2 number, since 2×4512321² = 40722081614082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4512294 and 4512303.

It is not an unprimeable number, because it can be changed into a prime (4512331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7300 + ... + 7893.

It is an arithmetic number, because the mean of its divisors is an integer number (455820).

Almost surely, 2^4512321 is an apocalyptic number.

It is an amenable number.

4512321 is a deficient number, since it is larger than the sum of its proper divisors (2780799).

4512321 is a wasteful number, since it uses less digits than its factorization.

4512321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15213 (or 15207 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 4512321 is about 2124.2224459788. Note that the first 3 decimals coincide. The cubic root of 4512321 is about 165.2469030816.

Adding to 4512321 its reverse (1232154), we get a palindrome (5744475).

It can be divided in two parts, 451 and 2321, that added together give a palindrome (2772).

The spelling of 4512321 in words is "four million, five hundred twelve thousand, three hundred twenty-one".