25720113 has 8 divisors (see below), whose sum is σ = 34369408. Its totient is φ = 17108784.

The previous prime is 25720103. The next prime is 25720127. The reversal of 25720113 is 31102752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25720113 - 2⁹ = 25719601 is a prime.

It is the 5072-nd Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25720113.

It is not an unprimeable number, because it can be changed into a prime (25720103) by changing a digit.

It is a nontrivial repunit in base 5071.

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 7 ways as a sum of consecutive naturals, for example, 7870 + ... + 10647.

It is an arithmetic number, because the mean of its divisors is an integer number (4296176).

Almost surely, 2^25720113 is an apocalyptic number.

It is an amenable number.

25720113 is a deficient number, since it is larger than the sum of its proper divisors (8649295).

25720113 is a wasteful number, since it uses less digits than its factorization.

25720113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18983.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 25720113 is about 5071.5000739426. The cubic root of 25720113 is about 295.1827384498.

Adding to 25720113 its reverse (31102752), we get a palindrome (56822865).

The spelling of 25720113 in words is "twenty-five million, seven hundred twenty thousand, one hundred thirteen".