71146321 has 2 divisors, whose sum is σ = 71146322. Its totient is φ = 71146320.

The previous prime is 71146303. The next prime is 71146351. The reversal of 71146321 is 12364117.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69072721 + 2073600 = 8311^2 + 1440^2 .

It is a cyclic number.

It is not a de Polignac number, because 71146321 - 2¹¹ = 71144273 is a prime.

It is equal to p_4181506 and since 71146321 and 4181506 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (71146351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35573160 + 35573161.

It is an arithmetic number, because the mean of its divisors is an integer number (35573161).

Almost surely, 2^71146321 is an apocalyptic number.

It is an amenable number.

71146321 is a deficient number, since it is larger than the sum of its proper divisors (1).

71146321 is an equidigital number, since it uses as much as digits as its factorization.

71146321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 71146321 is about 8434.8278583502. The cubic root of 71146321 is about 414.3660344976.

The spelling of 71146321 in words is "seventy-one million, one hundred forty-six thousand, three hundred twenty-one".