542381 has 6 divisors (see below), whose sum is σ = 630990. Its totient is φ = 464856.

The previous prime is 542371. The next prime is 542401. The reversal of 542381 is 183245.

It can be written as a sum of positive squares in only one way, i.e., 354025 + 188356 = 595^2 + 434^2 .

It is a de Polignac number, because none of the positive numbers 2^k-542381 is a prime.

It is a super-2 number, since 2×542381² = 588354298322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542371) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5486 + ... + 5583.

It is an arithmetic number, because the mean of its divisors is an integer number (105165).

2⁵⁴²³⁸¹ is an apocalyptic number.

It is an amenable number.

542381 is a deficient number, since it is larger than the sum of its proper divisors (88609).

542381 is a wasteful number, since it uses less digits than its factorization.

542381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11083 (or 11076 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 542381 is about 736.4652062386. The cubic root of 542381 is about 81.5520387291.

The spelling of 542381 in words is "five hundred forty-two thousand, three hundred eighty-one".