121506757 has 2 divisors, whose sum is σ = 121506758. Its totient is φ = 121506756.

The previous prime is 121506709. The next prime is 121506761. The reversal of 121506757 is 757605121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109851361 + 11655396 = 10481^2 + 3414^2 .

It is a cyclic number.

It is not a de Polignac number, because 121506757 - 2⁷ = 121506629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121506257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60753378 + 60753379.

It is an arithmetic number, because the mean of its divisors is an integer number (60753379).

Almost surely, 2^121506757 is an apocalyptic number.

It is an amenable number.

121506757 is a deficient number, since it is larger than the sum of its proper divisors (1).

121506757 is an equidigital number, since it uses as much as digits as its factorization.

121506757 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14700, while the sum is 34.

The square root of 121506757 is about 11023.0103420073. The cubic root of 121506757 is about 495.2982686959.

The spelling of 121506757 in words is "one hundred twenty-one million, five hundred six thousand, seven hundred fifty-seven".