25720133 has 6 divisors (see below), whose sum is σ = 27322386. Its totient is φ = 24206912.

The previous prime is 25720127. The next prime is 25720157. The reversal of 25720133 is 33102752.

It can be written as a sum of positive squares in 3 ways, for example, as 14010049 + 11710084 = 3743^2 + 3422^2 .

It is not a de Polignac number, because 25720133 - 2⁸ = 25719877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25720099 and 25720108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25720103) 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 5 ways as a sum of consecutive naturals, for example, 44210 + ... + 44787.

It is an arithmetic number, because the mean of its divisors is an integer number (4553731).

Almost surely, 2^25720133 is an apocalyptic number.

It is an amenable number.

25720133 is a deficient number, since it is larger than the sum of its proper divisors (1602253).

25720133 is an equidigital number, since it uses as much as digits as its factorization.

25720133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89031 (or 89014 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 25720133 is about 5071.5020457454. The cubic root of 25720133 is about 295.1828149613.

Adding to 25720133 its reverse (33102752), we get a palindrome (58822885).

The spelling of 25720133 in words is "twenty-five million, seven hundred twenty thousand, one hundred thirty-three".