1026139 has 2 divisors, whose sum is σ = 1026140. Its totient is φ = 1026138.

The previous prime is 1026127. The next prime is 1026143. The reversal of 1026139 is 9316201.

It is a strong prime.

It is an emirp because it is prime and its reverse (9316201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1026139 - 2¹¹ = 1024091 is a prime.

It is a super-2 number, since 2×1026139² = 2105922494642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1026119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513069 + 513070.

It is an arithmetic number, because the mean of its divisors is an integer number (513070).

2^1026139 is an apocalyptic number.

1026139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026139 is an equidigital number, since it uses as much as digits as its factorization.

1026139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1026139 is about 1012.9851923893. The cubic root of 1026139 is about 100.8638167213.

It can be divided in two parts, 102 and 6139, that added together give a square (6241 = 79²).

The spelling of 1026139 in words is "one million, twenty-six thousand, one hundred thirty-nine".