542247 has 4 divisors (see below), whose sum is σ = 723000. Its totient is φ = 361496.

The previous prime is 542237. The next prime is 542251. The reversal of 542247 is 742245.

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

It is a cyclic number.

It is not a de Polignac number, because 542247 - 2⁶ = 542183 is a prime.

It is a D-number.

542247 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542207) 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, 90372 + ... + 90377.

It is an arithmetic number, because the mean of its divisors is an integer number (180750).

2⁵⁴²²⁴⁷ is an apocalyptic number.

542247 is a deficient number, since it is larger than the sum of its proper divisors (180753).

542247 is a wasteful number, since it uses less digits than its factorization.

542247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180752.

The product of its digits is 2240, while the sum is 24.

The square root of 542247 is about 736.3742255131. The cubic root of 542247 is about 81.5453221263.

The spelling of 542247 in words is "five hundred forty-two thousand, two hundred forty-seven".