121564183 has 16 divisors (see below), whose sum is σ = 133358400. Its totient is φ = 110140416.

The previous prime is 121564153. The next prime is 121564189. The reversal of 121564183 is 381465121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121564183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121564189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187566 + ... + 188212.

It is an arithmetic number, because the mean of its divisors is an integer number (8334900).

Almost surely, 2^121564183 is an apocalyptic number.

121564183 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121564183 is a deficient number, since it is larger than the sum of its proper divisors (11794217).

121564183 is a wasteful number, since it uses less digits than its factorization.

121564183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its digits is 5760, while the sum is 31.

The square root of 121564183 is about 11025.6148581383. The cubic root of 121564183 is about 495.3762849845.

The spelling of 121564183 in words is "one hundred twenty-one million, five hundred sixty-four thousand, one hundred eighty-three".