120391 has 2 divisors, whose sum is σ = 120392. Its totient is φ = 120390.

The previous prime is 120383. The next prime is 120397. The reversal of 120391 is 193021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120391 - 2³ = 120383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60195 + 60196.

It is an arithmetic number, because the mean of its divisors is an integer number (60196).

2¹²⁰³⁹¹ is an apocalyptic number.

120391 is a deficient number, since it is larger than the sum of its proper divisors (1).

120391 is an equidigital number, since it uses as much as digits as its factorization.

120391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 120391 is about 346.9740624312. The cubic root of 120391 is about 49.3777550137.

The spelling of 120391 in words is "one hundred twenty thousand, three hundred ninety-one".