72106042 has 8 divisors (see below), whose sum is σ = 109640916. Its totient is φ = 35559072.

The previous prime is 72105991. The next prime is 72106043. The reversal of 72106042 is 24060127.

It can be written as a sum of positive squares in 2 ways, for example, as 70711281 + 1394761 = 8409^2 + 1181^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72106043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246793 + ... + 247084.

Almost surely, 2^72106042 is an apocalyptic number.

72106042 is a deficient number, since it is larger than the sum of its proper divisors (37534874).

72106042 is a wasteful number, since it uses less digits than its factorization.

72106042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493952.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 72106042 is about 8491.5276599679. The cubic root of 72106042 is about 416.2209016925.

Adding to 72106042 its reverse (24060127), we get a palindrome (96166169).

The spelling of 72106042 in words is "seventy-two million, one hundred six thousand, forty-two".