25321501 has 2 divisors, whose sum is σ = 25321502. Its totient is φ = 25321500.

The previous prime is 25321493. The next prime is 25321529. The reversal of 25321501 is 10512352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20259001 + 5062500 = 4501^2 + 2250^2 .

It is a cyclic number.

It is not a de Polignac number, because 25321501 - 2³ = 25321493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25321201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12660750 + 12660751.

It is an arithmetic number, because the mean of its divisors is an integer number (12660751).

Almost surely, 2^25321501 is an apocalyptic number.

It is an amenable number.

25321501 is a deficient number, since it is larger than the sum of its proper divisors (1).

25321501 is an equidigital number, since it uses as much as digits as its factorization.

25321501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 25321501 is about 5032.0473964382. The cubic root of 25321501 is about 293.6498716533.

Adding to 25321501 its reverse (10512352), we get a palindrome (35833853).

The spelling of 25321501 in words is "twenty-five million, three hundred twenty-one thousand, five hundred one".