25016540 has 48 divisors (see below), whose sum is σ = 56622720. Its totient is φ = 9253440.

The previous prime is 25016513. The next prime is 25016543. The reversal of 25016540 is 4561052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25016543) 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, 15575 + ... + 17105.

It is an arithmetic number, because the mean of its divisors is an integer number (1179640).

Almost surely, 2^25016540 is an apocalyptic number.

25016540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25016540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28311360).

25016540 is an abundant number, since it is smaller than the sum of its proper divisors (31606180).

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

25016540 is a wasteful number, since it uses less digits than its factorization.

25016540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602 (or 1600 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 25016540 is about 5001.6537265189. The cubic root of 25016540 is about 292.4662439434.

Adding to 25016540 its reverse (4561052), we get a palindrome (29577592).

The spelling of 25016540 in words is "twenty-five million, sixteen thousand, five hundred forty".