8374721 has 2 divisors, whose sum is σ = 8374722. Its totient is φ = 8374720.

The previous prime is 8374679. The next prime is 8374733. The reversal of 8374721 is 1274738.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8202496 + 172225 = 2864^2 + 415^2 .

It is a cyclic number.

It is not a de Polignac number, because 8374721 - 2⁶ = 8374657 is a prime.

It is not a weakly prime, because it can be changed into another prime (8374741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4187360 + 4187361.

It is an arithmetic number, because the mean of its divisors is an integer number (4187361).

Almost surely, 2^8374721 is an apocalyptic number.

It is an amenable number.

8374721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8374721 is an equidigital number, since it uses as much as digits as its factorization.

8374721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9408, while the sum is 32.

The square root of 8374721 is about 2893.9110214379. The cubic root of 8374721 is about 203.0751499287.

The spelling of 8374721 in words is "eight million, three hundred seventy-four thousand, seven hundred twenty-one".