121575577 has 16 divisors (see below), whose sum is σ = 127702080. Its totient is φ = 115641792.

The previous prime is 121575563. The next prime is 121575589. The reversal of 121575577 is 775575121.

It is a de Polignac number, because none of the positive numbers 2^k-121575577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121575527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438763 + ... + 439039.

It is an arithmetic number, because the mean of its divisors is an integer number (7981380).

Almost surely, 2^121575577 is an apocalyptic number.

It is an amenable number.

121575577 is a deficient number, since it is larger than the sum of its proper divisors (6126503).

121575577 is a wasteful number, since it uses less digits than its factorization.

121575577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552.

The product of its digits is 85750, while the sum is 40.

The square root of 121575577 is about 11026.1315519089. The cubic root of 121575577 is about 495.3917614210.

The spelling of 121575577 in words is "one hundred twenty-one million, five hundred seventy-five thousand, five hundred seventy-seven".