25603139 has 8 divisors (see below), whose sum is σ = 27200448. Its totient is φ = 24016000.

The previous prime is 25603133. The next prime is 25603157. The reversal of 25603139 is 93130652.

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

It is a cyclic number.

It is not a de Polignac number, because 25603139 - 2¹² = 25599043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25603133) 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, 3014 + ... + 7764.

It is an arithmetic number, because the mean of its divisors is an integer number (3400056).

Almost surely, 2^25603139 is an apocalyptic number.

25603139 is a deficient number, since it is larger than the sum of its proper divisors (1597309).

25603139 is a wasteful number, since it uses less digits than its factorization.

25603139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5085.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 25603139 is about 5059.9544464353. The cubic root of 25603139 is about 294.7345654144.

The spelling of 25603139 in words is "twenty-five million, six hundred three thousand, one hundred thirty-nine".