1027139 has 2 divisors, whose sum is σ = 1027140. Its totient is φ = 1027138.

The previous prime is 1027129. The next prime is 1027153. The reversal of 1027139 is 9317201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1027139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1027129) 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 as a sum of consecutive naturals, namely, 513569 + 513570.

It is an arithmetic number, because the mean of its divisors is an integer number (513570).

2^1027139 is an apocalyptic number.

1027139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1027139 is an equidigital number, since it uses as much as digits as its factorization.

1027139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 1027139 is about 1013.4786628242. The cubic root of 1027139 is about 100.8965709160.

The spelling of 1027139 in words is "one million, twenty-seven thousand, one hundred thirty-nine".