1022139 has 10 divisors (see below), whose sum is σ = 1527020. Its totient is φ = 681372.

The previous prime is 1022137. The next prime is 1022141. The reversal of 1022139 is 9312201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1022137) and next prime (1022141).

It is not a de Polignac number, because 1022139 - 2¹ = 1022137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1022137) 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 9 ways as a sum of consecutive naturals, for example, 6229 + ... + 6390.

It is an arithmetic number, because the mean of its divisors is an integer number (152702).

2^1022139 is an apocalyptic number.

1022139 is a deficient number, since it is larger than the sum of its proper divisors (504881).

1022139 is an equidigital number, since it uses as much as digits as its factorization.

1022139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12631 (or 12622 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 1022139 is about 1011.0089020380. The cubic root of 1022139 is about 100.7325867280.

Subtracting from 1022139 its sum of digits (18), we obtain a square (1022121 = 1011²).

The spelling of 1022139 in words is "one million, twenty-two thousand, one hundred thirty-nine".