138510001 has 4 divisors (see below), whose sum is σ = 158297152. Its totient is φ = 118722852.

The previous prime is 138509957. The next prime is 138510007. The reversal of 138510001 is 100015831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138510001 - 2⁷ = 138509873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138510007) by changing a digit.

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, 9893565 + ... + 9893578.

It is an arithmetic number, because the mean of its divisors is an integer number (39574288).

Almost surely, 2^138510001 is an apocalyptic number.

It is an amenable number.

138510001 is a deficient number, since it is larger than the sum of its proper divisors (19787151).

138510001 is an equidigital number, since it uses as much as digits as its factorization.

138510001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19787150.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 138510001 is about 11769.0271900442. The cubic root of 138510001 is about 517.4007383502.

Adding to 138510001 its reverse (100015831), we get a palindrome (238525832).

The spelling of 138510001 in words is "one hundred thirty-eight million, five hundred ten thousand, one".