25649542 has 8 divisors (see below), whose sum is σ = 39126600. Its totient is φ = 12607344.

The previous prime is 25649501. The next prime is 25649557. The reversal of 25649542 is 24594652.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 108567 + ... + 108802.

It is an arithmetic number, because the mean of its divisors is an integer number (4890825).

Almost surely, 2^25649542 is an apocalyptic number.

25649542 is a deficient number, since it is larger than the sum of its proper divisors (13477058).

25649542 is a wasteful number, since it uses less digits than its factorization.

25649542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217430.

The product of its digits is 86400, while the sum is 37.

The square root of 25649542 is about 5064.5376886741. The cubic root of 25649542 is about 294.9125164318.

The spelling of 25649542 in words is "twenty-five million, six hundred forty-nine thousand, five hundred forty-two".