4542442 has 4 divisors (see below), whose sum is σ = 6813666. Its totient is φ = 2271220.

The previous prime is 4542437. The next prime is 4542449. The reversal of 4542442 is 2442454.

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., 4532641 + 9801 = 2129^2 + 99^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4542449) 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, 1135609 + ... + 1135612.

Almost surely, 2^4542442 is an apocalyptic number.

4542442 is a deficient number, since it is larger than the sum of its proper divisors (2271224).

4542442 is a wasteful number, since it uses less digits than its factorization.

4542442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271223.

The product of its digits is 5120, while the sum is 25.

The square root of 4542442 is about 2131.3005419227. The cubic root of 4542442 is about 165.6137776661.

Adding to 4542442 its reverse (2442454), we get a palindrome (6984896).

The spelling of 4542442 in words is "four million, five hundred forty-two thousand, four hundred forty-two".