71073172 has 12 divisors (see below), whose sum is σ = 127411956. Its totient is φ = 34669760.

The previous prime is 71073169. The next prime is 71073179. The reversal of 71073172 is 27137017.

It can be written as a sum of positive squares in 2 ways, for example, as 12152196 + 58920976 = 3486^2 + 7676^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71073172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71073179) 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, 216523 + ... + 216850.

It is an arithmetic number, because the mean of its divisors is an integer number (10617663).

Almost surely, 2^71073172 is an apocalyptic number.

It is an amenable number.

71073172 is a deficient number, since it is larger than the sum of its proper divisors (56338784).

71073172 is a wasteful number, since it uses less digits than its factorization.

71073172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433418 (or 433416 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 28.

The square root of 71073172 is about 8430.4906144305. The cubic root of 71073172 is about 414.2239758291.

The spelling of 71073172 in words is "seventy-one million, seventy-three thousand, one hundred seventy-two".