72422122 has 8 divisors (see below), whose sum is σ = 108670500. Its totient is φ = 36198624.

The previous prime is 72422117. The next prime is 72422153. The reversal of 72422122 is 22122427.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 63186601 + 9235521 = 7949^2 + 3039^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 72422093 and 72422102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5404 + ... + 13192.

Almost surely, 2^72422122 is an apocalyptic number.

72422122 is a deficient number, since it is larger than the sum of its proper divisors (36248378).

72422122 is a wasteful number, since it uses less digits than its factorization.

72422122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12440.

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

The square root of 72422122 is about 8510.1188005809. The cubic root of 72422122 is about 416.8281893947.

Adding to 72422122 its reverse (22122427), we get a palindrome (94544549).

The spelling of 72422122 in words is "seventy-two million, four hundred twenty-two thousand, one hundred twenty-two".