8400841 has 2 divisors, whose sum is σ = 8400842. Its totient is φ = 8400840.

The previous prime is 8400829. The next prime is 8400851. The reversal of 8400841 is 1480048.

8400841 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8065600 + 335241 = 2840^2 + 579^2 .

It is a cyclic number.

It is not a de Polignac number, because 8400841 - 2⁷ = 8400713 is a prime.

It is not a weakly prime, because it can be changed into another prime (8400811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4200420 + 4200421.

It is an arithmetic number, because the mean of its divisors is an integer number (4200421).

Almost surely, 2^8400841 is an apocalyptic number.

It is an amenable number.

8400841 is a deficient number, since it is larger than the sum of its proper divisors (1).

8400841 is an equidigital number, since it uses as much as digits as its factorization.

8400841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 8400841 is about 2898.4204318904. The cubic root of 8400841 is about 203.2860551789.

Adding to 8400841 its reverse (1480048), we get a palindrome (9880889).

The spelling of 8400841 in words is "eight million, four hundred thousand, eight hundred forty-one".