138142005 has 8 divisors (see below), whose sum is σ = 221027232. Its totient is φ = 73675728.

The previous prime is 138142001. The next prime is 138142013. The reversal of 138142005 is 500241831.

138142005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138142005 - 2² = 138142001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138142001) 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, 4604719 + ... + 4604748.

It is an arithmetic number, because the mean of its divisors is an integer number (27628404).

Almost surely, 2^138142005 is an apocalyptic number.

138142005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138142005 is a deficient number, since it is larger than the sum of its proper divisors (82885227).

138142005 is an equidigital number, since it uses as much as digits as its factorization.

138142005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9209475.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 138142005 is about 11753.3827045664. The cubic root of 138142005 is about 516.9421185857.

Adding to 138142005 its reverse (500241831), we get a palindrome (638383836).

The spelling of 138142005 in words is "one hundred thirty-eight million, one hundred forty-two thousand, five".