121775069 has 8 divisors (see below), whose sum is σ = 131274360. Its totient is φ = 112294656.

The previous prime is 121775057. The next prime is 121775077. The reversal of 121775069 is 960577121.

It can be written as a sum of positive squares in 4 ways, for example, as 10725625 + 111049444 = 3275^2 + 10538^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121775069 - 2⁸ = 121774813 is a prime.

It is a super-2 number, since 2×121775069² = 29658334859909522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121775039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10529 + ... + 18825.

It is an arithmetic number, because the mean of its divisors is an integer number (16409295).

Almost surely, 2^121775069 is an apocalyptic number.

It is an amenable number.

121775069 is a deficient number, since it is larger than the sum of its proper divisors (9499291).

121775069 is a wasteful number, since it uses less digits than its factorization.

121775069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9439.

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 121775069 is about 11035.1741717111. The cubic root of 121775069 is about 495.6625742777.

The spelling of 121775069 in words is "one hundred twenty-one million, seven hundred seventy-five thousand, sixty-nine".