25778925 has 48 divisors (see below), whose sum is σ = 47844160. Its totient is φ = 13608000.

The previous prime is 25778917. The next prime is 25778933. The reversal of 25778925 is 52987752.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25778917) and next prime (25778933).

It is not a de Polignac number, because 25778925 - 2³ = 25778917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

Its product of digits (352800) is a multiple of the sum of its prime divisors (400).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 122070 + ... + 122280.

Almost surely, 2^25778925 is an apocalyptic number.

25778925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25778925 is a deficient number, since it is larger than the sum of its proper divisors (22065235).

25778925 is a wasteful number, since it uses less digits than its factorization.

25778925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 400 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 25778925 is about 5077.2950475622. The cubic root of 25778925 is about 295.4075569528.

The spelling of 25778925 in words is "twenty-five million, seven hundred seventy-eight thousand, nine hundred twenty-five".