25732521 has 12 divisors (see below), whose sum is σ = 37244272. Its totient is φ = 17120376.

The previous prime is 25732519. The next prime is 25732523. The reversal of 25732521 is 12523752.

It is an interprime number because it is at equal distance from previous prime (25732519) and next prime (25732523).

It is not a de Polignac number, because 25732521 - 2¹ = 25732519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25732523) 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 11 ways as a sum of consecutive naturals, for example, 2310 + ... + 7536.

Almost surely, 2^25732521 is an apocalyptic number.

It is an amenable number.

25732521 is a deficient number, since it is larger than the sum of its proper divisors (11511751).

25732521 is a wasteful number, since it uses less digits than its factorization.

25732521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5780 (or 5777 counting only the distinct ones).

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

The square root of 25732521 is about 5072.7232331362. The cubic root of 25732521 is about 295.2301985653.

The spelling of 25732521 in words is "twenty-five million, seven hundred thirty-two thousand, five hundred twenty-one".