72471122 has 4 divisors (see below), whose sum is σ = 108706686. Its totient is φ = 36235560.

The previous prime is 72471101. The next prime is 72471167. The reversal of 72471122 is 22117427.

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

It can be written as a sum of positive squares in only one way, i.e., 64625521 + 7845601 = 8039^2 + 2801^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72471091 and 72471100.

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 as a sum of consecutive naturals, namely, 18117779 + ... + 18117782.

Almost surely, 2^72471122 is an apocalyptic number.

72471122 is a deficient number, since it is larger than the sum of its proper divisors (36235564).

72471122 is a wasteful number, since it uses less digits than its factorization.

72471122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36235563.

The product of its digits is 1568, while the sum is 26.

The square root of 72471122 is about 8512.9972395156. The cubic root of 72471122 is about 416.9221753026.

Adding to 72471122 its reverse (22117427), we get a palindrome (94588549).

The spelling of 72471122 in words is "seventy-two million, four hundred seventy-one thousand, one hundred twenty-two".