25534520 has 64 divisors (see below), whose sum is σ = 63296640. Its totient is φ = 9193600.

The previous prime is 25534519. The next prime is 25534541. The reversal of 25534520 is 2543552.

It is a self number, because there is not a number n which added to its sum of digits gives 25534520.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57419 + ... + 57861.

It is an arithmetic number, because the mean of its divisors is an integer number (989010).

Almost surely, 2^25534520 is an apocalyptic number.

25534520 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 25534520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31648320).

25534520 is an abundant number, since it is smaller than the sum of its proper divisors (37762120).

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

25534520 is a wasteful number, since it uses less digits than its factorization.

25534520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 25534520 is about 5053.1693025269. The cubic root of 25534520 is about 294.4710236940.

The spelling of 25534520 in words is "twenty-five million, five hundred thirty-four thousand, five hundred twenty".