8121401 has 2 divisors, whose sum is σ = 8121402. Its totient is φ = 8121400.

The previous prime is 8121397. The next prime is 8121419. The reversal of 8121401 is 1041218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5180176 + 2941225 = 2276^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 8121401 - 2² = 8121397 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8121401.

It is not a weakly prime, because it can be changed into another prime (8121431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060700 + 4060701.

It is an arithmetic number, because the mean of its divisors is an integer number (4060701).

Almost surely, 2^8121401 is an apocalyptic number.

It is an amenable number.

8121401 is a deficient number, since it is larger than the sum of its proper divisors (1).

8121401 is an equidigital number, since it uses as much as digits as its factorization.

8121401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 8121401 is about 2849.8071864602. The cubic root of 8121401 is about 201.0066002800.

Adding to 8121401 its reverse (1041218), we get a palindrome (9162619).

The spelling of 8121401 in words is "eight million, one hundred twenty-one thousand, four hundred one".