121470257 has 2 divisors, whose sum is σ = 121470258. Its totient is φ = 121470256.

The previous prime is 121470247. The next prime is 121470259. The reversal of 121470257 is 752074121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119596096 + 1874161 = 10936^2 + 1369^2 .

It is a cyclic number.

It is not a de Polignac number, because 121470257 - 2¹⁴ = 121453873 is a prime.

Together with 121470259, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_6920615 and since 121470257 and 6920615 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (121470259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60735128 + 60735129.

It is an arithmetic number, because the mean of its divisors is an integer number (60735129).

Almost surely, 2^121470257 is an apocalyptic number.

It is an amenable number.

121470257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121470257 is an equidigital number, since it uses as much as digits as its factorization.

121470257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 121470257 is about 11021.3545900674. The cubic root of 121470257 is about 495.2486687181.

The spelling of 121470257 in words is "one hundred twenty-one million, four hundred seventy thousand, two hundred fifty-seven".