25321001 has 8 divisors (see below), whose sum is σ = 25787520. Its totient is φ = 24858288.

The previous prime is 25320991. The next prime is 25321013. The reversal of 25321001 is 10012352.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25321001 - 2¹⁸ = 25058857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25321201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14750 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (3223440).

Almost surely, 2^25321001 is an apocalyptic number.

It is an amenable number.

25321001 is a deficient number, since it is larger than the sum of its proper divisors (466519).

25321001 is a wasteful number, since it uses less digits than its factorization.

25321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 25321001 is about 5031.9977146259. The cubic root of 25321001 is about 293.6479388307.

Adding to 25321001 its reverse (10012352), we get a palindrome (35333353).

The spelling of 25321001 in words is "twenty-five million, three hundred twenty-one thousand, one".