71367421 has 2 divisors, whose sum is σ = 71367422. Its totient is φ = 71367420.

The previous prime is 71367397. The next prime is 71367433. The reversal of 71367421 is 12476317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56040196 + 15327225 = 7486^2 + 3915^2 .

It is a cyclic number.

It is not a de Polignac number, because 71367421 - 2⁷ = 71367293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71367451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35683710 + 35683711.

It is an arithmetic number, because the mean of its divisors is an integer number (35683711).

Almost surely, 2^71367421 is an apocalyptic number.

It is an amenable number.

71367421 is a deficient number, since it is larger than the sum of its proper divisors (1).

71367421 is an equidigital number, since it uses as much as digits as its factorization.

71367421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 31.

The square root of 71367421 is about 8447.9240645261. The cubic root of 71367421 is about 414.7948296328.

The spelling of 71367421 in words is "seventy-one million, three hundred sixty-seven thousand, four hundred twenty-one".