42720142 has 16 divisors (see below), whose sum is σ = 64782432. Its totient is φ = 21127680.

The previous prime is 42720107. The next prime is 42720193. The reversal of 42720142 is 24102724.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126598 + ... + 126934.

It is an arithmetic number, because the mean of its divisors is an integer number (4048902).

Almost surely, 2^42720142 is an apocalyptic number.

42720142 is a deficient number, since it is larger than the sum of its proper divisors (22062290).

42720142 is a wasteful number, since it uses less digits than its factorization.

42720142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 42720142 is about 6536.0647181618. The cubic root of 42720142 is about 349.5781093436.

Adding to 42720142 its reverse (24102724), we get a palindrome (66822866).

The spelling of 42720142 in words is "forty-two million, seven hundred twenty thousand, one hundred forty-two".