71061172 has 54 divisors (see below), whose sum is σ = 156726402. Its totient is φ = 27943776.

The previous prime is 71061169. The next prime is 71061203. The reversal of 71061172 is 27116017.

It can be written as a sum of positive squares in only one way, i.e., 49196196 + 21864976 = 7014^2 + 4676^2 .

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 in 17 ways as a sum of consecutive naturals, for example, 425433 + ... + 425599.

Almost surely, 2^71061172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71061172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78363201).

71061172 is an abundant number, since it is smaller than the sum of its proper divisors (85665230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71061172 is a wasteful number, since it uses less digits than its factorization.

71061172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 71061172 is about 8429.7788820348. The cubic root of 71061172 is about 414.2006619806.

Adding to 71061172 its reverse (27116017), we get a palindrome (98177189).

The spelling of 71061172 in words is "seventy-one million, sixty-one thousand, one hundred seventy-two".