71452681 has 4 divisors (see below), whose sum is σ = 71469972. Its totient is φ = 71435392.

The previous prime is 71452669. The next prime is 71452691. The reversal of 71452681 is 18625417.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37405456 + 34047225 = 6116^2 + 5835^2 .

It is a cyclic number.

It is not a de Polignac number, because 71452681 - 2⁹ = 71452169 is a prime.

It is a super-2 number, since 2×71452681² = 10210971244175522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71452691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605 + ... + 12061.

It is an arithmetic number, because the mean of its divisors is an integer number (17867493).

Almost surely, 2^71452681 is an apocalyptic number.

It is an amenable number.

71452681 is a deficient number, since it is larger than the sum of its proper divisors (17291).

71452681 is a wasteful number, since it uses less digits than its factorization.

71452681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17290.

The product of its digits is 13440, while the sum is 34.

The square root of 71452681 is about 8452.9687684269. The cubic root of 71452681 is about 414.9599438767.

The spelling of 71452681 in words is "seventy-one million, four hundred fifty-two thousand, six hundred eighty-one".