25920557 has 8 divisors (see below), whose sum is σ = 28815360. Its totient is φ = 23154480.

The previous prime is 25920523. The next prime is 25920589. The reversal of 25920557 is 75502952.

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

It is a cyclic number.

It is not a de Polignac number, because 25920557 - 2¹⁴ = 25904173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25920157) 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 7 ways as a sum of consecutive naturals, for example, 31757 + ... + 32562.

It is an arithmetic number, because the mean of its divisors is an integer number (3601920).

Almost surely, 2^25920557 is an apocalyptic number.

It is an amenable number.

25920557 is a deficient number, since it is larger than the sum of its proper divisors (2894803).

25920557 is a wasteful number, since it uses less digits than its factorization.

25920557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64363.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 25920557 is about 5091.2235268155. The cubic root of 25920557 is about 295.9475687812.

The spelling of 25920557 in words is "twenty-five million, nine hundred twenty thousand, five hundred fifty-seven".