25948987 has 4 divisors (see below), whose sum is σ = 27475416. Its totient is φ = 24422560.

The previous prime is 25948969. The next prime is 25948999. The reversal of 25948987 is 78984952.

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 25948987 - 2¹¹ = 25946939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25948957) 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, 763189 + ... + 763222.

It is an arithmetic number, because the mean of its divisors is an integer number (6868854).

Almost surely, 2^25948987 is an apocalyptic number.

25948987 is a deficient number, since it is larger than the sum of its proper divisors (1526429).

25948987 is a wasteful number, since it uses less digits than its factorization.

25948987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526428.

The product of its digits is 1451520, while the sum is 52.

The square root of 25948987 is about 5094.0148213369. The cubic root of 25948987 is about 296.0557289458.

The spelling of 25948987 in words is "twenty-five million, nine hundred forty-eight thousand, nine hundred eighty-seven".