121659257 has 2 divisors, whose sum is σ = 121659258. Its totient is φ = 121659256.

The previous prime is 121659253. The next prime is 121659277. The reversal of 121659257 is 752956121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116726416 + 4932841 = 10804^2 + 2221^2 .

It is a cyclic number.

It is not a de Polignac number, because 121659257 - 2² = 121659253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121659257.

It is not a weakly prime, because it can be changed into another prime (121659253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60829628 + 60829629.

It is an arithmetic number, because the mean of its divisors is an integer number (60829629).

Almost surely, 2^121659257 is an apocalyptic number.

It is an amenable number.

121659257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121659257 is an equidigital number, since it uses as much as digits as its factorization.

121659257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 38.

The square root of 121659257 is about 11029.9255210541. The cubic root of 121659257 is about 495.5053940992.

The spelling of 121659257 in words is "one hundred twenty-one million, six hundred fifty-nine thousand, two hundred fifty-seven".