121573559 has 2 divisors, whose sum is σ = 121573560. Its totient is φ = 121573558.

The previous prime is 121573541. The next prime is 121573603. The reversal of 121573559 is 955375121.

It is a weak prime.

It is an emirp because it is prime and its reverse (955375121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121573559 - 2⁸ = 121573303 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121573759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60786779 + 60786780.

It is an arithmetic number, because the mean of its divisors is an integer number (60786780).

Almost surely, 2^121573559 is an apocalyptic number.

121573559 is a deficient number, since it is larger than the sum of its proper divisors (1).

121573559 is an equidigital number, since it uses as much as digits as its factorization.

121573559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47250, while the sum is 38.

The square root of 121573559 is about 11026.0400416469. The cubic root of 121573559 is about 495.3890204480.

The spelling of 121573559 in words is "one hundred twenty-one million, five hundred seventy-three thousand, five hundred fifty-nine".