545242 has 4 divisors (see below), whose sum is σ = 817866. Its totient is φ = 272620.

The previous prime is 545239. The next prime is 545257. The reversal of 545242 is 242545.

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

It can be written as a sum of positive squares in only one way, i.e., 361201 + 184041 = 601^2 + 429^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136309 + ... + 136312.

2⁵⁴⁵²⁴² is an apocalyptic number.

545242 is a deficient number, since it is larger than the sum of its proper divisors (272624).

545242 is a wasteful number, since it uses less digits than its factorization.

545242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272623.

The product of its digits is 1600, while the sum is 22.

The square root of 545242 is about 738.4050379026. The cubic root of 545242 is about 81.6951800108.

Adding to 545242 its reverse (242545), we get a palindrome (787787).

It can be divided in two parts, 545 and 242, that added together give a palindrome (787).

The spelling of 545242 in words is "five hundred forty-five thousand, two hundred forty-two".