25664042 has 8 divisors (see below), whose sum is σ = 39127332. Its totient is φ = 12621600.

The previous prime is 25664029. The next prime is 25664083. The reversal of 25664042 is 24046652.

It can be written as a sum of positive squares in 2 ways, for example, as 24990001 + 674041 = 4999^2 + 821^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 25663996 and 25664014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105059 + ... + 105302.

Almost surely, 2^25664042 is an apocalyptic number.

25664042 is a deficient number, since it is larger than the sum of its proper divisors (13463290).

25664042 is a wasteful number, since it uses less digits than its factorization.

25664042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210424.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 25664042 is about 5065.9690089853. The cubic root of 25664042 is about 294.9680785147.

The spelling of 25664042 in words is "twenty-five million, six hundred sixty-four thousand, forty-two".