71045449 has 2 divisors, whose sum is σ = 71045450. Its totient is φ = 71045448.

The previous prime is 71045357. The next prime is 71045453. The reversal of 71045449 is 94454017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60528400 + 10517049 = 7780^2 + 3243^2 .

It is a cyclic number.

It is not a de Polignac number, because 71045449 - 2¹⁵ = 71012681 is a prime.

It is a super-2 number, since 2×71045449² = 10094911647223202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71045479) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35522724 + 35522725.

It is an arithmetic number, because the mean of its divisors is an integer number (35522725).

Almost surely, 2^71045449 is an apocalyptic number.

It is an amenable number.

71045449 is a deficient number, since it is larger than the sum of its proper divisors (1).

71045449 is an equidigital number, since it uses as much as digits as its factorization.

71045449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 71045449 is about 8428.8462437038. The cubic root of 71045449 is about 414.1701110379.

The spelling of 71045449 in words is "seventy-one million, forty-five thousand, four hundred forty-nine".