121544973 has 24 divisors (see below), whose sum is σ = 191994816. Its totient is φ = 73483200.

The previous prime is 121544911. The next prime is 121544981. The reversal of 121544973 is 379445121.

121544973 is a `hidden beast` number, since 1 + 21 + 544 + 97 + 3 = 666.

It is not a de Polignac number, because 121544973 - 2⁶ = 121544909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121544173) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46953 + ... + 49473.

It is an arithmetic number, because the mean of its divisors is an integer number (7999784).

Almost surely, 2^121544973 is an apocalyptic number.

It is an amenable number.

121544973 is a deficient number, since it is larger than the sum of its proper divisors (70449843).

121544973 is a wasteful number, since it uses less digits than its factorization.

121544973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3025 (or 3022 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 121544973 is about 11024.7436704896. The cubic root of 121544973 is about 495.3501899086.

The spelling of 121544973 in words is "one hundred twenty-one million, five hundred forty-four thousand, nine hundred seventy-three".