121458917 has 2 divisors, whose sum is σ = 121458918. Its totient is φ = 121458916.

The previous prime is 121458913. The next prime is 121458937. The reversal of 121458917 is 719854121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107516161 + 13942756 = 10369^2 + 3734^2 .

It is a cyclic number.

It is not a de Polignac number, because 121458917 - 2² = 121458913 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121458913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60729458 + 60729459.

It is an arithmetic number, because the mean of its divisors is an integer number (60729459).

Almost surely, 2^121458917 is an apocalyptic number.

It is an amenable number.

121458917 is a deficient number, since it is larger than the sum of its proper divisors (1).

121458917 is an equidigital number, since it uses as much as digits as its factorization.

121458917 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 121458917 is about 11020.8401222411. The cubic root of 121458917 is about 495.2332567294.

The spelling of 121458917 in words is "one hundred twenty-one million, four hundred fifty-eight thousand, nine hundred seventeen".