25995501 has 12 divisors (see below), whose sum is σ = 42913312. Its totient is φ = 14854536.

The previous prime is 25995469. The next prime is 25995511. The reversal of 25995501 is 10559952.

It is not a de Polignac number, because 25995501 - 2⁵ = 25995469 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 (25995511) 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 11 ways as a sum of consecutive naturals, for example, 206251 + ... + 206376.

Almost surely, 2^25995501 is an apocalyptic number.

25995501 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

25995501 is a deficient number, since it is larger than the sum of its proper divisors (16917811).

25995501 is a wasteful number, since it uses less digits than its factorization.

25995501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412640 (or 412637 counting only the distinct ones).

The product of its (nonzero) digits is 20250, while the sum is 36.

The square root of 25995501 is about 5098.5783312606. The cubic root of 25995501 is about 296.2325183296.

It can be divided in two parts, 2599 and 5501, that added together give a square (8100 = 90²).

The spelling of 25995501 in words is "twenty-five million, nine hundred ninety-five thousand, five hundred one".