25642029 has 8 divisors (see below), whose sum is σ = 39073600. Its totient is φ = 14652576.

The previous prime is 25642013. The next prime is 25642051. The reversal of 25642029 is 92024652.

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

It is not a de Polignac number, because 25642029 - 2⁴ = 25642013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25641987 and 25642005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25642129) 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, 610504 + ... + 610545.

It is an arithmetic number, because the mean of its divisors is an integer number (4884200).

Almost surely, 2^25642029 is an apocalyptic number.

It is an amenable number.

25642029 is a deficient number, since it is larger than the sum of its proper divisors (13431571).

25642029 is a wasteful number, since it uses less digits than its factorization.

25642029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221059.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 25642029 is about 5063.7959082096. The cubic root of 25642029 is about 294.8837193731.

The spelling of 25642029 in words is "twenty-five million, six hundred forty-two thousand, twenty-nine".