291542 has 4 divisors (see below), whose sum is σ = 437316. Its totient is φ = 145770.

The previous prime is 291539. The next prime is 291547. The reversal of 291542 is 245192.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291542.

It is not an unprimeable number, because it can be changed into a prime (291547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72884 + ... + 72887.

It is an arithmetic number, because the mean of its divisors is an integer number (109329).

2²⁹¹⁵⁴² is an apocalyptic number.

291542 is a deficient number, since it is larger than the sum of its proper divisors (145774).

291542 is a wasteful number, since it uses less digits than its factorization.

291542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145773.

The product of its digits is 720, while the sum is 23.

The square root of 291542 is about 539.9462936256. The cubic root of 291542 is about 66.3081701032.

The spelling of 291542 in words is "two hundred ninety-one thousand, five hundred forty-two".