72134422 has 4 divisors (see below), whose sum is σ = 108201636. Its totient is φ = 36067210.

The previous prime is 72134399. The next prime is 72134437. The reversal of 72134422 is 22443127.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 18033604 + ... + 18033607.

It is an arithmetic number, because the mean of its divisors is an integer number (27050409).

Almost surely, 2^72134422 is an apocalyptic number.

72134422 is a deficient number, since it is larger than the sum of its proper divisors (36067214).

72134422 is a wasteful number, since it uses less digits than its factorization.

72134422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36067213.

The product of its digits is 2688, while the sum is 25.

The square root of 72134422 is about 8493.1985729759. The cubic root of 72134422 is about 416.2755009071.

Adding to 72134422 its reverse (22443127), we get a palindrome (94577549).

The spelling of 72134422 in words is "seventy-two million, one hundred thirty-four thousand, four hundred twenty-two".