25273520 has 40 divisors (see below), whose sum is σ = 59735760. Its totient is φ = 9941760.

The previous prime is 25273519. The next prime is 25273531. The reversal of 25273520 is 2537252.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 25273520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2291 + ... + 7469.

It is an arithmetic number, because the mean of its divisors is an integer number (1493394).

Almost surely, 2^25273520 is an apocalyptic number.

25273520 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 25273520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29867880).

25273520 is an abundant number, since it is smaller than the sum of its proper divisors (34462240).

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

25273520 is a wasteful number, since it uses less digits than its factorization.

25273520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5253 (or 5247 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 25273520 is about 5027.2775932904. The cubic root of 25273520 is about 293.4642780845.

The spelling of 25273520 in words is "twenty-five million, two hundred seventy-three thousand, five hundred twenty".