25000321 has 2 divisors, whose sum is σ = 25000322. Its totient is φ = 25000320.

The previous prime is 25000303. The next prime is 25000351. The reversal of 25000321 is 12300052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23814400 + 1185921 = 4880^2 + 1089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25000321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25000351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500160 + 12500161.

It is an arithmetic number, because the mean of its divisors is an integer number (12500161).

Almost surely, 2^25000321 is an apocalyptic number.

It is an amenable number.

25000321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25000321 is an equidigital number, since it uses as much as digits as its factorization.

25000321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 25000321 is about 5000.0320998970. The cubic root of 25000321 is about 292.4030252955.

Adding to 25000321 its reverse (12300052), we get a palindrome (37300373).

The spelling of 25000321 in words is "twenty-five million, three hundred twenty-one", and thus it is an aban number.