25857069 has 16 divisors (see below), whose sum is σ = 40673280. Its totient is φ = 14298480.

The previous prime is 25857053. The next prime is 25857079. The reversal of 25857069 is 96075852.

It is not a de Polignac number, because 25857069 - 2⁴ = 25857053 is a prime.

It is a super-2 number, since 2×25857069² = 1337176034541522, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25857069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25857079) 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 15 ways as a sum of consecutive naturals, for example, 19209 + ... + 20510.

It is an arithmetic number, because the mean of its divisors is an integer number (2542080).

Almost surely, 2^25857069 is an apocalyptic number.

It is an amenable number.

25857069 is a deficient number, since it is larger than the sum of its proper divisors (14816211).

25857069 is a wasteful number, since it uses less digits than its factorization.

25857069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39760.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 25857069 is about 5084.9846607438. The cubic root of 25857069 is about 295.7057468120.

The spelling of 25857069 in words is "twenty-five million, eight hundred fifty-seven thousand, sixty-nine".