25006321 has 2 divisors, whose sum is σ = 25006322. Its totient is φ = 25006320.

The previous prime is 25006297. The next prime is 25006327. The reversal of 25006321 is 12360052.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20575296 + 4431025 = 4536^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 25006321 - 2⁷ = 25006193 is a prime.

It is not a weakly prime, because it can be changed into another prime (25006327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12503160 + 12503161.

It is an arithmetic number, because the mean of its divisors is an integer number (12503161).

Almost surely, 2^25006321 is an apocalyptic number.

It is an amenable number.

25006321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25006321 is an equidigital number, since it uses as much as digits as its factorization.

25006321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 25006321 is about 5000.6320600500. The cubic root of 25006321 is about 292.4264153661.

Adding to 25006321 its reverse (12360052), we get a palindrome (37366373).

The spelling of 25006321 in words is "twenty-five million, six thousand, three hundred twenty-one".