25722500 has 30 divisors (see below), whose sum is σ = 56255430. Its totient is φ = 10288000.

The previous prime is 25722491. The next prime is 25722503. The reversal of 25722500 is 522752.

It can be written as a sum of positive squares in 5 ways, for example, as 4910656 + 20811844 = 2216^2 + 4562^2 .

It is not an unprimeable number, because it can be changed into a prime (25722503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2645 + ... + 7644.

It is an arithmetic number, because the mean of its divisors is an integer number (1875181).

Almost surely, 2^25722500 is an apocalyptic number.

25722500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25722500 is an abundant number, since it is smaller than the sum of its proper divisors (30532930).

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

25722500 is a wasteful number, since it uses less digits than its factorization.

25722500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10313 (or 10296 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 25722500 is about 5071.7354031929. The cubic root of 25722500 is about 295.1918698172.

It can be divided in two parts, 25 and 722500, that multiplied together give a square (18062500 = 4250²).

The spelling of 25722500 in words is "twenty-five million, seven hundred twenty-two thousand, five hundred".