25725321 has 6 divisors (see below), whose sum is σ = 37158810. Its totient is φ = 17150208.

The previous prime is 25725317. The next prime is 25725341. The reversal of 25725321 is 12352752.

It can be written as a sum of positive squares in only one way, i.e., 25644096 + 81225 = 5064^2 + 285^2 .

It is not a de Polignac number, because 25725321 - 2² = 25725317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25725341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1429176 + ... + 1429193.

It is an arithmetic number, because the mean of its divisors is an integer number (6193135).

Almost surely, 2^25725321 is an apocalyptic number.

It is an amenable number.

25725321 is a deficient number, since it is larger than the sum of its proper divisors (11433489).

25725321 is a wasteful number, since it uses less digits than its factorization.

25725321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858375 (or 2858372 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 25725321 is about 5072.0135055025. The cubic root of 25725321 is about 295.2026607049.

The spelling of 25725321 in words is "twenty-five million, seven hundred twenty-five thousand, three hundred twenty-one".