25525691 has 4 divisors (see below), whose sum is σ = 25875432. Its totient is φ = 25175952.

The previous prime is 25525681. The next prime is 25525693. The reversal of 25525691 is 19652552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25525691 - 2⁶ = 25525627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25525693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174761 + ... + 174906.

It is an arithmetic number, because the mean of its divisors is an integer number (6468858).

Almost surely, 2^25525691 is an apocalyptic number.

25525691 is a deficient number, since it is larger than the sum of its proper divisors (349741).

25525691 is an equidigital number, since it uses as much as digits as its factorization.

25525691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349740.

The product of its digits is 27000, while the sum is 35.

The square root of 25525691 is about 5052.2956168459. The cubic root of 25525691 is about 294.4370803058.

The spelling of 25525691 in words is "twenty-five million, five hundred twenty-five thousand, six hundred ninety-one".