25081720 has 32 divisors (see below), whose sum is σ = 57503520. Its totient is φ = 9842560.

The previous prime is 25081717. The next prime is 25081741. The reversal of 25081720 is 2718052.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3796 + ... + 8035.

It is an arithmetic number, because the mean of its divisors is an integer number (1796985).

Almost surely, 2^25081720 is an apocalyptic number.

25081720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25081720 is an abundant number, since it is smaller than the sum of its proper divisors (32421800).

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

25081720 is a wasteful number, since it uses less digits than its factorization.

25081720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11895 (or 11891 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 25081720 is about 5008.1653327341. The cubic root of 25081720 is about 292.7200282755.

Adding to 25081720 its reverse (2718052), we get a palindrome (27799772).

The spelling of 25081720 in words is "twenty-five million, eighty-one thousand, seven hundred twenty".