542342642 has 4 divisors (see below), whose sum is σ = 813513966. Its totient is φ = 271171320.

The previous prime is 542342621. The next prime is 542342651. The reversal of 542342642 is 246243245.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 246243245 = 5 ⋅49248649.

It can be written as a sum of positive squares in only one way, i.e., 460059601 + 82283041 = 21449^2 + 9071^2 .

It is a junction number, because it is equal to n+sod(n) for n = 542342599 and 542342608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135585659 + ... + 135585662.

Almost surely, 2^542342642 is an apocalyptic number.

542342642 is a deficient number, since it is larger than the sum of its proper divisors (271171324).

542342642 is a wasteful number, since it uses less digits than its factorization.

542342642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271171323.

The product of its digits is 46080, while the sum is 32.

The square root of 542342642 is about 23288.2511580410. The cubic root of 542342642 is about 815.5011618954.

Adding to 542342642 its reverse (246243245), we get a palindrome (788585887).

The spelling of 542342642 in words is "five hundred forty-two million, three hundred forty-two thousand, six hundred forty-two".