25725819 has 16 divisors (see below), whose sum is σ = 40158720. Its totient is φ = 14341440.

The previous prime is 25725809. The next prime is 25725823. The reversal of 25725819 is 91852752.

It is not a de Polignac number, because 25725819 - 2⁴ = 25725803 is a prime.

It is a super-2 number, since 2×25725819² = 1323635526441522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25725809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14079 + ... + 15800.

It is an arithmetic number, because the mean of its divisors is an integer number (2509920).

Almost surely, 2^25725819 is an apocalyptic number.

25725819 is a deficient number, since it is larger than the sum of its proper divisors (14432901).

25725819 is a wasteful number, since it uses less digits than its factorization.

25725819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29930.

The product of its digits is 50400, while the sum is 39.

The square root of 25725819 is about 5072.0625981942. The cubic root of 25725819 is about 295.2045655723.

The spelling of 25725819 in words is "twenty-five million, seven hundred twenty-five thousand, eight hundred nineteen".