542345242 has 4 divisors (see below), whose sum is σ = 813517866. Its totient is φ = 271172620.

The previous prime is 542345239. The next prime is 542345261. The reversal of 542345242 is 242543245.

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., 436851801 + 105493441 = 20901^2 + 10271^2 .

It is a Smith number, since the sum of its digits (31) 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, 135586309 + ... + 135586312.

Almost surely, 2^542345242 is an apocalyptic number.

542345242 is a deficient number, since it is larger than the sum of its proper divisors (271172624).

542345242 is a wasteful number, since it uses less digits than its factorization.

542345242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271172623.

The product of its digits is 38400, while the sum is 31.

The square root of 542345242 is about 23288.3069801134. The cubic root of 542345242 is about 815.5024650689.

Adding to 542345242 its reverse (242543245), we get a palindrome (784888487).

The spelling of 542345242 in words is "five hundred forty-two million, three hundred forty-five thousand, two hundred forty-two".