72042442 has 8 divisors (see below), whose sum is σ = 108108000. Its totient is φ = 36006444.

The previous prime is 72042431. The next prime is 72042473. The reversal of 72042442 is 24424027.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×72042442² = 10380226898646728, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 309 + ... + 12007.

It is an arithmetic number, because the mean of its divisors is an integer number (13513500).

Almost surely, 2^72042442 is an apocalyptic number.

72042442 is a deficient number, since it is larger than the sum of its proper divisors (36065558).

72042442 is a wasteful number, since it uses less digits than its factorization.

72042442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14780.

The product of its (nonzero) digits is 3584, while the sum is 25.

The square root of 72042442 is about 8487.7819246255. The cubic root of 72042442 is about 416.0984919960.

Adding to 72042442 its reverse (24424027), we get a palindrome (96466469).

The spelling of 72042442 in words is "seventy-two million, forty-two thousand, four hundred forty-two".