121660457 has 2 divisors, whose sum is σ = 121660458. Its totient is φ = 121660456.

The previous prime is 121660447. The next prime is 121660463. The reversal of 121660457 is 754066121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117267241 + 4393216 = 10829^2 + 2096^2 .

It is a cyclic number.

It is not a de Polignac number, because 121660457 - 2²⁶ = 54551593 is a prime.

It is not a weakly prime, because it can be changed into another prime (121660447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60830228 + 60830229.

It is an arithmetic number, because the mean of its divisors is an integer number (60830229).

Almost surely, 2^121660457 is an apocalyptic number.

It is an amenable number.

121660457 is a deficient number, since it is larger than the sum of its proper divisors (1).

121660457 is an equidigital number, since it uses as much as digits as its factorization.

121660457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 121660457 is about 11029.9799183861. The cubic root of 121660457 is about 495.5070232519.

The spelling of 121660457 in words is "one hundred twenty-one million, six hundred sixty thousand, four hundred fifty-seven".