581942 has 4 divisors (see below), whose sum is σ = 872916. Its totient is φ = 290970.

The previous prime is 581941. The next prime is 581947. The reversal of 581942 is 249185.

It is a semiprime because it is the product of two primes.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145484 + ... + 145487.

It is an arithmetic number, because the mean of its divisors is an integer number (218229).

2⁵⁸¹⁹⁴² is an apocalyptic number.

581942 is a deficient number, since it is larger than the sum of its proper divisors (290974).

581942 is a wasteful number, since it uses less digits than its factorization.

581942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290973.

The product of its digits is 2880, while the sum is 29.

The square root of 581942 is about 762.8512305817. The cubic root of 581942 is about 83.4884825210.

The spelling of 581942 in words is "five hundred eighty-one thousand, nine hundred forty-two".