121285559 has 2 divisors, whose sum is σ = 121285560. Its totient is φ = 121285558.

The previous prime is 121285513. The next prime is 121285561. The reversal of 121285559 is 955582121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121285559 - 2¹⁶ = 121220023 is a prime.

Together with 121285561, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_6910679 and since 121285559 and 6910679 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121287559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60642779 + 60642780.

It is an arithmetic number, because the mean of its divisors is an integer number (60642780).

Almost surely, 2^121285559 is an apocalyptic number.

121285559 is a deficient number, since it is larger than the sum of its proper divisors (1).

121285559 is an equidigital number, since it uses as much as digits as its factorization.

121285559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 38.

The square root of 121285559 is about 11012.9723054224. The cubic root of 121285559 is about 494.9975294915.

The spelling of 121285559 in words is "one hundred twenty-one million, two hundred eighty-five thousand, five hundred fifty-nine".