25998765 has 16 divisors (see below), whose sum is σ = 44798208. Its totient is φ = 12799296.

The previous prime is 25998757. The next prime is 25998767. The reversal of 25998765 is 56789952.

It is a happy number.

It is not a de Polignac number, because 25998765 - 2³ = 25998757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25998767) 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, 66469 + ... + 66858.

It is an arithmetic number, because the mean of its divisors is an integer number (2799888).

Almost surely, 2^25998765 is an apocalyptic number.

It is an amenable number.

25998765 is a deficient number, since it is larger than the sum of its proper divisors (18799443).

25998765 is a wasteful number, since it uses less digits than its factorization.

25998765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133348.

The product of its digits is 1360800, while the sum is 51.

The square root of 25998765 is about 5098.8984104412. The cubic root of 25998765 is about 296.2449161477.

The spelling of 25998765 in words is "twenty-five million, nine hundred ninety-eight thousand, seven hundred sixty-five".