25701520 has 60 divisors (see below), whose sum is σ = 64740276. Its totient is φ = 9484800.

The previous prime is 25701497. The next prime is 25701539. The reversal of 25701520 is 2510752.

It can be written as a sum of positive squares in 6 ways, for example, as 10863616 + 14837904 = 3296^2 + 3852^2 .

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25701491 and 25701500.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12570 + ... + 14470.

Almost surely, 2^25701520 is an apocalyptic number.

25701520 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 25701520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32370138).

25701520 is an abundant number, since it is smaller than the sum of its proper divisors (39038756).

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

25701520 is a wasteful number, since it uses less digits than its factorization.

25701520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940 (or 1921 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 25701520 is about 5069.6666557082. Note that the first 4 decimals coincide. The cubic root of 25701520 is about 295.1115923694. Note that the first 3 decimals are identical.

The spelling of 25701520 in words is "twenty-five million, seven hundred one thousand, five hundred twenty".