121451257 has 2 divisors, whose sum is σ = 121451258. Its totient is φ = 121451256.

The previous prime is 121451219. The next prime is 121451303. The reversal of 121451257 is 752154121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90326016 + 31125241 = 9504^2 + 5579^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121451257 is a prime.

It is not a weakly prime, because it can be changed into another prime (121452257) 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, 60725628 + 60725629.

It is an arithmetic number, because the mean of its divisors is an integer number (60725629).

Almost surely, 2^121451257 is an apocalyptic number.

It is an amenable number.

121451257 is a deficient number, since it is larger than the sum of its proper divisors (1).

121451257 is an equidigital number, since it uses as much as digits as its factorization.

121451257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 28.

The square root of 121451257 is about 11020.4925933463. The cubic root of 121451257 is about 495.2228456193. Note that the first 3 decimals are identical.

The spelling of 121451257 in words is "one hundred twenty-one million, four hundred fifty-one thousand, two hundred fifty-seven".