291042 has 48 divisors (see below), whose sum is σ = 711360. Its totient is φ = 85536.

The previous prime is 291041. The next prime is 291043. The reversal of 291042 is 240192.

It is an interprime number because it is at equal distance from previous prime (291041) and next prime (291043).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291042.

It is not an unprimeable number, because it can be changed into a prime (291041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7848 + ... + 7884.

It is an arithmetic number, because the mean of its divisors is an integer number (14820).

2²⁹¹⁰⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 291042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355680).

291042 is an abundant number, since it is smaller than the sum of its proper divisors (420318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

291042 is a wasteful number, since it uses less digits than its factorization.

291042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 291042 is about 539.4830859258. The cubic root of 291042 is about 66.2702418271.

The spelling of 291042 in words is "two hundred ninety-one thousand, forty-two".