542881 has 4 divisors (see below), whose sum is σ = 556164. Its totient is φ = 529600.

The previous prime is 542873. The next prime is 542891. The reversal of 542881 is 188245.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188245 = 5 ⋅37649.

It can be written as a sum of positive squares in 2 ways, for example, as 312481 + 230400 = 559^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 542881 - 2³ = 542873 is a prime.

It is a super-2 number, since 2×542881² = 589439560322, which contains 22 as substring.

It is a Duffinian number.

542881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (542821) 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, 6580 + ... + 6661.

It is an arithmetic number, because the mean of its divisors is an integer number (139041).

2⁵⁴²⁸⁸¹ is an apocalyptic number.

It is an amenable number.

542881 is a deficient number, since it is larger than the sum of its proper divisors (13283).

542881 is a wasteful number, since it uses less digits than its factorization.

542881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13282.

The product of its digits is 2560, while the sum is 28.

The square root of 542881 is about 736.8045873907. The cubic root of 542881 is about 81.5770909193.

It can be divided in two parts, 54288 and 1, that added together give a square (54289 = 233²).

The spelling of 542881 in words is "five hundred forty-two thousand, eight hundred eighty-one".