25603138 has 16 divisors (see below), whose sum is σ = 41975424. Its totient is φ = 11615760.

The previous prime is 25603133. The next prime is 25603157. The reversal of 25603138 is 83130652.

It is not an unprimeable number, because it can be changed into a prime (25603133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18631 + ... + 19957.

It is an arithmetic number, because the mean of its divisors is an integer number (2623464).

Almost surely, 2^25603138 is an apocalyptic number.

25603138 is a deficient number, since it is larger than the sum of its proper divisors (16372286).

25603138 is a wasteful number, since it uses less digits than its factorization.

25603138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 25603138 is about 5059.9543476201. The cubic root of 25603138 is about 294.7345615772.

The spelling of 25603138 in words is "twenty-five million, six hundred three thousand, one hundred thirty-eight".