13825138 has 4 divisors (see below), whose sum is σ = 20737710. Its totient is φ = 6912568.

The previous prime is 13825129. The next prime is 13825157. The reversal of 13825138 is 83152831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12652249 + 1172889 = 3557^2 + 1083^2 .

It is a super-2 number, since 2×13825138² = 382268881438088, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 3456283 + ... + 3456286.

Almost surely, 2^13825138 is an apocalyptic number.

13825138 is a deficient number, since it is larger than the sum of its proper divisors (6912572).

13825138 is an equidigital number, since it uses as much as digits as its factorization.

13825138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6912571.

The product of its digits is 5760, while the sum is 31.

The square root of 13825138 is about 3718.2170458433. The cubic root of 13825138 is about 240.0065854674.

Adding to 13825138 its reverse (83152831), we get a palindrome (96977969).

The spelling of 13825138 in words is "thirteen million, eight hundred twenty-five thousand, one hundred thirty-eight".