542669 has 4 divisors (see below), whose sum is σ = 544380. Its totient is φ = 540960.

The previous prime is 542603. The next prime is 542683. The reversal of 542669 is 966245.

542669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 170569 + 372100 = 413^2 + 610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542669 is a prime.

It is a super-2 number, since 2×542669² = 588979287122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541669) 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, 224 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (136095).

2⁵⁴²⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

542669 is a deficient number, since it is larger than the sum of its proper divisors (1711).

542669 is a wasteful number, since it uses less digits than its factorization.

542669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710.

The product of its digits is 12960, while the sum is 32.

The square root of 542669 is about 736.6607088749. The cubic root of 542669 is about 81.5664706698.

The spelling of 542669 in words is "five hundred forty-two thousand, six hundred sixty-nine".