2539321 has 2 divisors, whose sum is σ = 2539322. Its totient is φ = 2539320.

The previous prime is 2539319. The next prime is 2539337. The reversal of 2539321 is 1239352.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2524921 + 14400 = 1589^2 + 120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2539321 - 2¹ = 2539319 is a prime.

It is a super-2 number, since 2×2539321² = 12896302282082, which contains 22 as substring.

Together with 2539319, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2¹¹ + 5⁹ + 3⁶ + 9² + 3¹⁰ + 2¹⁹ + 1 .

It is not a weakly prime, because it can be changed into another prime (2539351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269660 + 1269661.

It is an arithmetic number, because the mean of its divisors is an integer number (1269661).

2^2539321 is an apocalyptic number.

It is an amenable number.

2539321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2539321 is an equidigital number, since it uses as much as digits as its factorization.

2539321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620, while the sum is 25.

The square root of 2539321 is about 1593.5247095668. The cubic root of 2539321 is about 136.4287399701.

The spelling of 2539321 in words is "two million, five hundred thirty-nine thousand, three hundred twenty-one".