138842127 has 16 divisors (see below), whose sum is σ = 205994080. Its totient is φ = 92425536.

The previous prime is 138842107. The next prime is 138842147. The reversal of 138842127 is 721248831.

It is an interprime number because it is at equal distance from previous prime (138842107) and next prime (138842147).

It is a de Polignac number, because none of the positive numbers 2^k-138842127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138842091 and 138842100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138842107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17043 + ... + 23835.

It is an arithmetic number, because the mean of its divisors is an integer number (12874630).

Almost surely, 2^138842127 is an apocalyptic number.

138842127 is a deficient number, since it is larger than the sum of its proper divisors (67151953).

138842127 is an equidigital number, since it uses as much as digits as its factorization.

138842127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7559 (or 7553 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 138842127 is about 11783.1289138327. The cubic root of 138842127 is about 517.8139577772.

The spelling of 138842127 in words is "one hundred thirty-eight million, eight hundred forty-two thousand, one hundred twenty-seven".