121459817 has 2 divisors, whose sum is σ = 121459818. Its totient is φ = 121459816.

The previous prime is 121459787. The next prime is 121459831. The reversal of 121459817 is 718954121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105904681 + 15555136 = 10291^2 + 3944^2 .

It is an emirp because it is prime and its reverse (718954121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121459817 - 2¹⁴ = 121443433 is a prime.

It is not a weakly prime, because it can be changed into another prime (121459847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60729908 + 60729909.

It is an arithmetic number, because the mean of its divisors is an integer number (60729909).

Almost surely, 2^121459817 is an apocalyptic number.

It is an amenable number.

121459817 is a deficient number, since it is larger than the sum of its proper divisors (1).

121459817 is an equidigital number, since it uses as much as digits as its factorization.

121459817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 38.

The square root of 121459817 is about 11020.8809538984. The cubic root of 121459817 is about 495.2344799382.

The spelling of 121459817 in words is "one hundred twenty-one million, four hundred fifty-nine thousand, eight hundred seventeen".