138517451 has 8 divisors (see below), whose sum is σ = 139791744. Its totient is φ = 137249280.

The previous prime is 138517441. The next prime is 138517453. The reversal of 138517451 is 154715831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138517451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138517453) 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 7 ways as a sum of consecutive naturals, for example, 52166 + ... + 54756.

It is an arithmetic number, because the mean of its divisors is an integer number (17473968).

Almost surely, 2^138517451 is an apocalyptic number.

138517451 is a deficient number, since it is larger than the sum of its proper divisors (1274293).

138517451 is a wasteful number, since it uses less digits than its factorization.

138517451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061.

The product of its digits is 16800, while the sum is 35.

The square root of 138517451 is about 11769.3436945311. The cubic root of 138517451 is about 517.4100146151.

The spelling of 138517451 in words is "one hundred thirty-eight million, five hundred seventeen thousand, four hundred fifty-one".