542291 has 4 divisors (see below), whose sum is σ = 544800. Its totient is φ = 539784.

The previous prime is 542281. The next prime is 542293. The reversal of 542291 is 192245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192245 = 5 ⋅38449.

It is a cyclic number.

It is not a de Polignac number, because 542291 - 2¹⁰ = 541267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896 + ... + 1373.

It is an arithmetic number, because the mean of its divisors is an integer number (136200).

2⁵⁴²²⁹¹ is an apocalyptic number.

542291 is a deficient number, since it is larger than the sum of its proper divisors (2509).

542291 is a wasteful number, since it uses less digits than its factorization.

542291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508.

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

The square root of 542291 is about 736.4041010206. The cubic root of 542291 is about 81.5475277000.

The spelling of 542291 in words is "five hundred forty-two thousand, two hundred ninety-one".