139822 has 4 divisors (see below), whose sum is σ = 209736. Its totient is φ = 69910.

The previous prime is 139813. The next prime is 139831. The reversal of 139822 is 228931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 228931 = 19 ⋅12049.

It is an interprime number because it is at equal distance from previous prime (139813) and next prime (139831).

It is an Ulam number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34954 + ... + 34957.

It is an arithmetic number, because the mean of its divisors is an integer number (52434).

2¹³⁹⁸²² is an apocalyptic number.

139822 is a deficient number, since it is larger than the sum of its proper divisors (69914).

139822 is an equidigital number, since it uses as much as digits as its factorization.

139822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69913.

The product of its digits is 864, while the sum is 25.

The square root of 139822 is about 373.9278005177. The cubic root of 139822 is about 51.9029254009.

It can be divided in two parts, 139 and 822, that added together give a square (961 = 31²).

The spelling of 139822 in words is "one hundred thirty-nine thousand, eight hundred twenty-two".