103642138 has 8 divisors (see below), whose sum is σ = 155622132. Its totient is φ = 51768096.

The previous prime is 103642129. The next prime is 103642141. The reversal of 103642138 is 831246301.

It can be written as a sum of positive squares in 2 ways, for example, as 91718929 + 11923209 = 9577^2 + 3453^2 .

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

It is a super-3 number, since 3×103642138³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 23995 + ... + 27982.

Almost surely, 2^103642138 is an apocalyptic number.

103642138 is a deficient number, since it is larger than the sum of its proper divisors (51979994).

103642138 is an equidigital number, since it uses as much as digits as its factorization.

103642138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52976.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 103642138 is about 10180.4782795309. The cubic root of 103642138 is about 469.7269245154.

Adding to 103642138 its reverse (831246301), we get a palindrome (934888439).

The spelling of 103642138 in words is "one hundred three million, six hundred forty-two thousand, one hundred thirty-eight".