121281659 has 2 divisors, whose sum is σ = 121281660. Its totient is φ = 121281658.

The previous prime is 121281637. The next prime is 121281697. The reversal of 121281659 is 956182121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121281659 is a prime.

It is a super-3 number, since 3×121281659³ (a number of 25 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121281619) 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, 60640829 + 60640830.

It is an arithmetic number, because the mean of its divisors is an integer number (60640830).

Almost surely, 2^121281659 is an apocalyptic number.

121281659 is a deficient number, since it is larger than the sum of its proper divisors (1).

121281659 is an equidigital number, since it uses as much as digits as its factorization.

121281659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 35.

The square root of 121281659 is about 11012.7952400832. The cubic root of 121281659 is about 494.9922238006.

The spelling of 121281659 in words is "one hundred twenty-one million, two hundred eighty-one thousand, six hundred fifty-nine".