122391 has 10 divisors (see below), whose sum is σ = 182952. Its totient is φ = 81540.

The previous prime is 122389. The next prime is 122393. The reversal of 122391 is 193221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (122389) and next prime (122393).

It is not a de Polignac number, because 122391 - 2¹ = 122389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122393) 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 in 9 ways as a sum of consecutive naturals, for example, 675 + ... + 836.

2¹²²³⁹¹ is an apocalyptic number.

122391 is a deficient number, since it is larger than the sum of its proper divisors (60561).

122391 is an equidigital number, since it uses as much as digits as its factorization.

122391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523 (or 1514 counting only the distinct ones).

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

The square root of 122391 is about 349.8442510604. The cubic root of 122391 is about 49.6496846486.

The spelling of 122391 in words is "one hundred twenty-two thousand, three hundred ninety-one".