71272172 has 12 divisors (see below), whose sum is σ = 124902960. Its totient is φ = 35585616.

The previous prime is 71272171. The next prime is 71272247. The reversal of 71272172 is 27127217.

It is not an unprimeable number, because it can be changed into a prime (71272171) 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, 9347 + ... + 15162.

It is an arithmetic number, because the mean of its divisors is an integer number (10408580).

Almost surely, 2^71272172 is an apocalyptic number.

It is an amenable number.

71272172 is a deficient number, since it is larger than the sum of its proper divisors (53630788).

71272172 is a wasteful number, since it uses less digits than its factorization.

71272172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25240 (or 25238 counting only the distinct ones).

The product of its digits is 2744, while the sum is 29.

The square root of 71272172 is about 8442.2847618402. The cubic root of 71272172 is about 414.6102151325.

Adding to 71272172 its reverse (27127217), we get a palindrome (98399389).

The spelling of 71272172 in words is "seventy-one million, two hundred seventy-two thousand, one hundred seventy-two".