71407172 has 6 divisors (see below), whose sum is σ = 124962558. Its totient is φ = 35703584.

The previous prime is 71407153. The next prime is 71407177. The reversal of 71407172 is 27170417.

It can be written as a sum of positive squares in only one way, i.e., 50922496 + 20484676 = 7136^2 + 4526^2 .

It is not an unprimeable number, because it can be changed into a prime (71407177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8925893 + ... + 8925900.

It is an arithmetic number, because the mean of its divisors is an integer number (20827093).

Almost surely, 2^71407172 is an apocalyptic number.

It is an amenable number.

71407172 is a deficient number, since it is larger than the sum of its proper divisors (53555386).

71407172 is a wasteful number, since it uses less digits than its factorization.

71407172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17851797 (or 17851795 counting only the distinct ones).

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

The square root of 71407172 is about 8450.2764451821. The cubic root of 71407172 is about 414.8718276461.

Adding to 71407172 its reverse (27170417), we get a palindrome (98577589).

The spelling of 71407172 in words is "seventy-one million, four hundred seven thousand, one hundred seventy-two".