540245042 has 4 divisors (see below), whose sum is σ = 810367566. Its totient is φ = 270122520.

The previous prime is 540245039. The next prime is 540245047. The reversal of 540245042 is 240542045.

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., 464014681 + 76230361 = 21541^2 + 8731^2 .

It is not an unprimeable number, because it can be changed into a prime (540245047) by changing a digit.

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, 135061259 + ... + 135061262.

Almost surely, 2^540245042 is an apocalyptic number.

540245042 is a deficient number, since it is larger than the sum of its proper divisors (270122524).

540245042 is a wasteful number, since it uses less digits than its factorization.

540245042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270122523.

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 540245042 is about 23243.1719436053. The cubic root of 540245042 is about 814.4484415964.

Adding to 540245042 its reverse (240542045), we get a palindrome (780787087).

The spelling of 540245042 in words is "five hundred forty million, two hundred forty-five thousand, forty-two".