71382481 has 2 divisors, whose sum is σ = 71382482. Its totient is φ = 71382480.

The previous prime is 71382463. The next prime is 71382497. The reversal of 71382481 is 18428317.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 21538881 = 7060^2 + 4641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71382481 is a prime.

It is a super-2 number, since 2×71382481² = 10190917187430722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71382431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35691240 + 35691241.

It is an arithmetic number, because the mean of its divisors is an integer number (35691241).

Almost surely, 2^71382481 is an apocalyptic number.

71382481 is the 5344-th centered pentagonal number.

It is an amenable number.

71382481 is a deficient number, since it is larger than the sum of its proper divisors (1).

71382481 is an equidigital number, since it uses as much as digits as its factorization.

71382481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 34.

The square root of 71382481 is about 8448.8153607473. The cubic root of 71382481 is about 414.8240043397.

The spelling of 71382481 in words is "seventy-one million, three hundred eighty-two thousand, four hundred eighty-one".