25565340 has 24 divisors (see below), whose sum is σ = 71583120. Its totient is φ = 6817408.

The previous prime is 25565333. The next prime is 25565341. The reversal of 25565340 is 4356552.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25565298 and 25565307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25565341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212985 + ... + 213104.

It is an arithmetic number, because the mean of its divisors is an integer number (2982630).

Almost surely, 2^25565340 is an apocalyptic number.

25565340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25565340 is an abundant number, since it is smaller than the sum of its proper divisors (46017780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25565340 is a wasteful number, since it uses less digits than its factorization.

25565340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426101 (or 426099 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 25565340 is about 5056.2179541630. The cubic root of 25565340 is about 294.5894509316.

The spelling of 25565340 in words is "twenty-five million, five hundred sixty-five thousand, three hundred forty".