542091 has 8 divisors (see below), whose sum is σ = 788544. Its totient is φ = 328520.

The previous prime is 542083. The next prime is 542093. The reversal of 542091 is 190245.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 542091 - 2³ = 542083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (542093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8181 + ... + 8246.

It is an arithmetic number, because the mean of its divisors is an integer number (98568).

2⁵⁴²⁰⁹¹ is an apocalyptic number.

542091 is a deficient number, since it is larger than the sum of its proper divisors (246453).

542091 is a wasteful number, since it uses less digits than its factorization.

542091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16441.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 542091 is about 736.2682934909. The cubic root of 542091 is about 81.5375014036.

It can be divided in two parts, 54 and 2091, that added together give a triangular number (2145 = T₆₅).

The spelling of 542091 in words is "five hundred forty-two thousand, ninety-one".