1018139 has 4 divisors (see below), whose sum is σ = 1021080. Its totient is φ = 1015200.

The previous prime is 1018123. The next prime is 1018177. The reversal of 1018139 is 9318101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1018139 - 2⁴ = 1018123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1018109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 869 + ... + 1670.

It is an arithmetic number, because the mean of its divisors is an integer number (255270).

2^1018139 is an apocalyptic number.

1018139 is a deficient number, since it is larger than the sum of its proper divisors (2941).

1018139 is an equidigital number, since it uses as much as digits as its factorization.

1018139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2940.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1018139 is about 1009.0287409187. The cubic root of 1018139 is about 100.6010139195.

The spelling of 1018139 in words is "one million, eighteen thousand, one hundred thirty-nine".