121575427 has 2 divisors, whose sum is σ = 121575428. Its totient is φ = 121575426.

The previous prime is 121575409. The next prime is 121575463. The reversal of 121575427 is 724575121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121575427 is a prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 121575392 and 121575401.

It is not a weakly prime, because it can be changed into another prime (121575227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60787713 + 60787714.

It is an arithmetic number, because the mean of its divisors is an integer number (60787714).

Almost surely, 2^121575427 is an apocalyptic number.

121575427 is a deficient number, since it is larger than the sum of its proper divisors (1).

121575427 is an equidigital number, since it uses as much as digits as its factorization.

121575427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19600, while the sum is 34.

The square root of 121575427 is about 11026.1247498838. The cubic root of 121575427 is about 495.3915576827.

The spelling of 121575427 in words is "one hundred twenty-one million, five hundred seventy-five thousand, four hundred twenty-seven".