542243402 has 4 divisors (see below), whose sum is σ = 813365106. Its totient is φ = 271121700.

The previous prime is 542243341. The next prime is 542243411. The reversal of 542243402 is 204342245.

It is a happy number.

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., 537266041 + 4977361 = 23179^2 + 2231^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135560849 + ... + 135560852.

Almost surely, 2^542243402 is an apocalyptic number.

542243402 is a deficient number, since it is larger than the sum of its proper divisors (271121704).

542243402 is a wasteful number, since it uses less digits than its factorization.

542243402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271121703.

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 542243402 is about 23286.1203724450. The cubic root of 542243402 is about 815.4514176527.

Adding to 542243402 its reverse (204342245), we get a palindrome (746585647).

The spelling of 542243402 in words is "five hundred forty-two million, two hundred forty-three thousand, four hundred two".