71345441 has 2 divisors, whose sum is σ = 71345442. Its totient is φ = 71345440.

The previous prime is 71345431. The next prime is 71345459. The reversal of 71345441 is 14454317.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70980625 + 364816 = 8425^2 + 604^2 .

It is a cyclic number.

It is not a de Polignac number, because 71345441 - 2²² = 67151137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71345411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35672720 + 35672721.

It is an arithmetic number, because the mean of its divisors is an integer number (35672721).

Almost surely, 2^71345441 is an apocalyptic number.

It is an amenable number.

71345441 is a deficient number, since it is larger than the sum of its proper divisors (1).

71345441 is an equidigital number, since it uses as much as digits as its factorization.

71345441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 29.

The square root of 71345441 is about 8446.6230530313. The cubic root of 71345441 is about 414.7522419162.

Adding to 71345441 its reverse (14454317), we get a palindrome (85799758).

The spelling of 71345441 in words is "seventy-one million, three hundred forty-five thousand, four hundred forty-one".