25900042 has 16 divisors (see below), whose sum is σ = 44465472. Its totient is φ = 11083680.

The previous prime is 25900033. The next prime is 25900081. The reversal of 25900042 is 24000952.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25899986 and 25900022.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17358 + ... + 18790.

It is an arithmetic number, because the mean of its divisors is an integer number (2779092).

Almost surely, 2^25900042 is an apocalyptic number.

25900042 is a deficient number, since it is larger than the sum of its proper divisors (18565430).

25900042 is a wasteful number, since it uses less digits than its factorization.

25900042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 25900042 is about 5089.2083863799. The cubic root of 25900042 is about 295.8694716063.

Adding to 25900042 its reverse (24000952), we get a palindrome (49900994).

The spelling of 25900042 in words is "twenty-five million, nine hundred thousand, forty-two".