8341721 has 2 divisors, whose sum is σ = 8341722. Its totient is φ = 8341720.

The previous prime is 8341667. The next prime is 8341727. The reversal of 8341721 is 1271438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8323225 + 18496 = 2885^2 + 136^2 .

It is a cyclic number.

It is not a de Polignac number, because 8341721 - 2⁶ = 8341657 is a prime.

It is not a weakly prime, because it can be changed into another prime (8341727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4170860 + 4170861.

It is an arithmetic number, because the mean of its divisors is an integer number (4170861).

Almost surely, 2^8341721 is an apocalyptic number.

It is an amenable number.

8341721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8341721 is an equidigital number, since it uses as much as digits as its factorization.

8341721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 26.

The square root of 8341721 is about 2888.2037670497. The cubic root of 8341721 is about 202.8080643544.

It can be divided in two parts, 83417 and 21, that added together give a palindrome (83438).

The spelling of 8341721 in words is "eight million, three hundred forty-one thousand, seven hundred twenty-one".