942391 has 6 divisors (see below), whose sum is σ = 960792. Its totient is φ = 924300.

The previous prime is 942371. The next prime is 942401. The reversal of 942391 is 193249.

It is a happy number.

It is not a de Polignac number, because 942391 - 2⁹ = 941879 is a prime.

It is an Ulam number.

It is a Duffinian number.

942391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (942301) 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 5 ways as a sum of consecutive naturals, for example, 6166 + ... + 6316.

It is an arithmetic number, because the mean of its divisors is an integer number (160132).

2⁹⁴²³⁹¹ is an apocalyptic number.

942391 is a deficient number, since it is larger than the sum of its proper divisors (18401).

942391 is an equidigital number, since it uses as much as digits as its factorization.

942391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 230 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 942391 is about 970.7682524681. The cubic root of 942391 is about 98.0415969463.

It can be divided in two parts, 94 and 2391, that added together give a triangular number (2485 = T₇₀).

The spelling of 942391 in words is "nine hundred forty-two thousand, three hundred ninety-one".