71042449 has 2 divisors, whose sum is σ = 71042450. Its totient is φ = 71042448.

The previous prime is 71042443. The next prime is 71042453. The reversal of 71042449 is 94424017.

71042449 is nontrivially palindromic in base 14.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48650625 + 22391824 = 6975^2 + 4732^2 .

It is a cyclic number.

It is not a de Polignac number, because 71042449 - 2¹⁵ = 71009681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71042449.

It is not a weakly prime, because it can be changed into another prime (71042443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35521224 + 35521225.

It is an arithmetic number, because the mean of its divisors is an integer number (35521225).

Almost surely, 2^71042449 is an apocalyptic number.

It is an amenable number.

71042449 is a deficient number, since it is larger than the sum of its proper divisors (1).

71042449 is an equidigital number, since it uses as much as digits as its factorization.

71042449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 71042449 is about 8428.6682815259. The cubic root of 71042449 is about 414.1642813057.

The spelling of 71042449 in words is "seventy-one million, forty-two thousand, four hundred forty-nine".