25506542 has 8 divisors (see below), whose sum is σ = 39293976. Its totient is φ = 12408552.

The previous prime is 25506497. The next prime is 25506557. The reversal of 25506542 is 24560552.

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172268 + ... + 172415.

It is an arithmetic number, because the mean of its divisors is an integer number (4911747).

Almost surely, 2^25506542 is an apocalyptic number.

25506542 is a deficient number, since it is larger than the sum of its proper divisors (13787434).

25506542 is a wasteful number, since it uses less digits than its factorization.

25506542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344722.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 25506542 is about 5050.4001821638. The cubic root of 25506542 is about 294.3634344231.

The spelling of 25506542 in words is "twenty-five million, five hundred six thousand, five hundred forty-two".