25005921 has 8 divisors (see below), whose sum is σ = 33685344. Its totient is φ = 16498560.

The previous prime is 25005907. The next prime is 25005923. The reversal of 25005921 is 12950052.

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

It is not a de Polignac number, because 25005921 - 2⁵ = 25005889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25005891 and 25005900.

It is not an unprimeable number, because it can be changed into a prime (25005923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42675 + ... + 43256.

It is an arithmetic number, because the mean of its divisors is an integer number (4210668).

Almost surely, 2^25005921 is an apocalyptic number.

It is an amenable number.

25005921 is a deficient number, since it is larger than the sum of its proper divisors (8679423).

25005921 is an equidigital number, since it uses as much as digits as its factorization.

25005921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86031.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 25005921 is about 5000.5920649459. The cubic root of 25005921 is about 292.4248561445.

Adding to 25005921 its reverse (12950052), we get a palindrome (37955973).

The spelling of 25005921 in words is "twenty-five million, five thousand, nine hundred twenty-one".