71934245 has 6 divisors (see below), whose sum is σ = 86343858. Its totient is φ = 57532224.

The previous prime is 71934241. The next prime is 71934251. The reversal of 71934245 is 54243917.

It can be written as a sum of positive squares in 3 ways, for example, as 40804 + 71893441 = 202^2 + 8479^2 .

It is not a de Polignac number, because 71934245 - 2² = 71934241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71934241) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17069 + ... + 20861.

It is an arithmetic number, because the mean of its divisors is an integer number (14390643).

Almost surely, 2^71934245 is an apocalyptic number.

It is an amenable number.

71934245 is a deficient number, since it is larger than the sum of its proper divisors (14409613).

71934245 is an frugal number, since it uses more digits than its factorization.

71934245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7591 (or 3798 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 71934245 is about 8481.4058386567. The cubic root of 71934245 is about 415.8900816748.

The spelling of 71934245 in words is "seventy-one million, nine hundred thirty-four thousand, two hundred forty-five".