121646257 has 2 divisors, whose sum is σ = 121646258. Its totient is φ = 121646256.

The previous prime is 121646243. The next prime is 121646279. The reversal of 121646257 is 752646121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120648256 + 998001 = 10984^2 + 999^2 .

It is a cyclic number.

It is not a de Polignac number, because 121646257 - 2¹¹ = 121644209 is a prime.

It is a super-2 number, since 2×121646257² = 29595623684220098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121646557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60823128 + 60823129.

It is an arithmetic number, because the mean of its divisors is an integer number (60823129).

Almost surely, 2^121646257 is an apocalyptic number.

It is an amenable number.

121646257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121646257 is an equidigital number, since it uses as much as digits as its factorization.

121646257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 121646257 is about 11029.3361994274. The cubic root of 121646257 is about 495.4877442583.

The spelling of 121646257 in words is "one hundred twenty-one million, six hundred forty-six thousand, two hundred fifty-seven".