2523321 has 12 divisors (see below), whose sum is σ = 3667300. Its totient is φ = 1671840.

The previous prime is 2523317. The next prime is 2523329. The reversal of 2523321 is 1233252.

It can be written as a sum of positive squares in 2 ways, for example, as 318096 + 2205225 = 564^2 + 1485^2 .

It is not a de Polignac number, because 2523321 - 2² = 2523317 is a prime.

It is a Duffinian number.

2523321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2523294 and 2523303.

It is not an unprimeable number, because it can be changed into a prime (2523329) 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, 855 + ... + 2403.

2^2523321 is an apocalyptic number.

It is an amenable number.

2523321 is a deficient number, since it is larger than the sum of its proper divisors (1143979).

2523321 is a wasteful number, since it uses less digits than its factorization.

2523321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736 (or 1733 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 2523321 is about 1588.4964589196. The cubic root of 2523321 is about 136.1415948876.

Adding to 2523321 its reverse (1233252), we get a palindrome (3756573).

The spelling of 2523321 in words is "two million, five hundred twenty-three thousand, three hundred twenty-one".