1822139 has 12 divisors (see below), whose sum is σ = 2059848. Its totient is φ = 1611720.

The previous prime is 1822123. The next prime is 1822147. The reversal of 1822139 is 9312281.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is not a de Polignac number, because 1822139 - 2⁴ = 1822123 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

Its product of digits (864) is a multiple of the sum of its prime divisors (48).

It is not an unprimeable number, because it can be changed into a prime (1822109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49229 + ... + 49265.

It is an arithmetic number, because the mean of its divisors is an integer number (171654).

2^1822139 is an apocalyptic number.

1822139 is a deficient number, since it is larger than the sum of its proper divisors (237709).

1822139 is an frugal number, since it uses more digits than its factorization.

1822139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 48 counting only the distinct ones).

The product of its digits is 864, while the sum is 26.

The square root of 1822139 is about 1349.8662896746. The cubic root of 1822139 is about 122.1407271545.

The spelling of 1822139 in words is "one million, eight hundred twenty-two thousand, one hundred thirty-nine".