121580257 has 2 divisors, whose sum is σ = 121580258. Its totient is φ = 121580256.

The previous prime is 121580237. The next prime is 121580281. The reversal of 121580257 is 752085121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65270241 + 56310016 = 8079^2 + 7504^2 .

It is a cyclic number.

It is not a de Polignac number, because 121580257 - 2¹¹ = 121578209 is a prime.

It is not a weakly prime, because it can be changed into another prime (121580227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60790128 + 60790129.

It is an arithmetic number, because the mean of its divisors is an integer number (60790129).

Almost surely, 2^121580257 is an apocalyptic number.

It is an amenable number.

121580257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121580257 is an equidigital number, since it uses as much as digits as its factorization.

121580257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 121580257 is about 11026.3437729830. The cubic root of 121580257 is about 495.3981179709.

The spelling of 121580257 in words is "one hundred twenty-one million, five hundred eighty thousand, two hundred fifty-seven".