25887951 has 16 divisors (see below), whose sum is σ = 38488320. Its totient is φ = 17197560.

The previous prime is 25887947. The next prime is 25887971. The reversal of 25887951 is 15978852.

It is a happy number.

It is not a de Polignac number, because 25887951 - 2² = 25887947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25887897 and 25887906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25887941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6856 + ... + 9938.

It is an arithmetic number, because the mean of its divisors is an integer number (2405520).

Almost surely, 2^25887951 is an apocalyptic number.

25887951 is a deficient number, since it is larger than the sum of its proper divisors (12600369).

25887951 is a wasteful number, since it uses less digits than its factorization.

25887951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3403 (or 3397 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 25887951 is about 5088.0203419405. The cubic root of 25887951 is about 295.8234238740.

Subtracting from 25887951 its reverse (15978852), we obtain a palindrome (9909099).

It can be divided in two parts, 258 and 87951, that added together give a square (88209 = 297²).

The spelling of 25887951 in words is "twenty-five million, eight hundred eighty-seven thousand, nine hundred fifty-one".