25532591 has 8 divisors (see below), whose sum is σ = 29731104. Its totient is φ = 21471840.

The previous prime is 25532581. The next prime is 25532621. The reversal of 25532591 is 19523552.

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 25532591 - 2¹⁰ = 25531567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25532531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34040 + ... + 34781.

It is an arithmetic number, because the mean of its divisors is an integer number (3716388).

It is the magic constant of a 371 × 371 magic square.

Almost surely, 2^25532591 is an apocalyptic number.

25532591 is a deficient number, since it is larger than the sum of its proper divisors (4198513).

25532591 is an equidigital number, since it uses as much as digits as its factorization.

25532591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68881.

The product of its digits is 13500, while the sum is 32.

The square root of 25532591 is about 5052.9784286102. The cubic root of 25532591 is about 294.4636082565.

The spelling of 25532591 in words is "twenty-five million, five hundred thirty-two thousand, five hundred ninety-one".