121548969 has 12 divisors (see below), whose sum is σ = 179853492. Its totient is φ = 79056000.

The previous prime is 121548953. The next prime is 121548971. The reversal of 121548969 is 969845121.

121548969 is a `hidden beast` number, since 12 + 1 + 548 + 96 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17264025 + 104284944 = 4155^2 + 10212^2 .

It is not a de Polignac number, because 121548969 - 2⁴ = 121548953 is a prime.

It is a super-2 number, since 2×121548969² = 29548303729925922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121548919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 164332 + ... + 165069.

It is an arithmetic number, because the mean of its divisors is an integer number (14987791).

Almost surely, 2^121548969 is an apocalyptic number.

It is an amenable number.

121548969 is a deficient number, since it is larger than the sum of its proper divisors (58304523).

121548969 is a wasteful number, since it uses less digits than its factorization.

121548969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329448 (or 329445 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 121548969 is about 11024.9248977034. The cubic root of 121548969 is about 495.3556183456.

The spelling of 121548969 in words is "one hundred twenty-one million, five hundred forty-eight thousand, nine hundred sixty-nine".