121457009 has 2 divisors, whose sum is σ = 121457010. Its totient is φ = 121457008.

The previous prime is 121457003. The next prime is 121457053. The reversal of 121457009 is 900754121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88360000 + 33097009 = 9400^2 + 5753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121457009 is a prime.

It is not a weakly prime, because it can be changed into another prime (121457003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60728504 + 60728505.

It is an arithmetic number, because the mean of its divisors is an integer number (60728505).

Almost surely, 2^121457009 is an apocalyptic number.

It is an amenable number.

121457009 is a deficient number, since it is larger than the sum of its proper divisors (1).

121457009 is an equidigital number, since it uses as much as digits as its factorization.

121457009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 121457009 is about 11020.7535586275. The cubic root of 121457009 is about 495.2306635069.

The spelling of 121457009 in words is "one hundred twenty-one million, four hundred fifty-seven thousand, nine".