121544423 has 64 divisors (see below), whose sum is σ = 174182400. Its totient is φ = 81768960.

The previous prime is 121544419. The next prime is 121544431. The reversal of 121544423 is 324445121.

It is not a de Polignac number, because 121544423 - 2² = 121544419 is a prime.

Its product of digits (3840) is a multiple of the sum of its prime divisors (192).

It is a junction number, because it is equal to n+sod(n) for n = 121544392 and 121544401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121544023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1538498 + ... + 1538576.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^121544423 is an apocalyptic number.

121544423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

121544423 is a deficient number, since it is larger than the sum of its proper divisors (52637977).

121544423 is a wasteful number, since it uses less digits than its factorization.

121544423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192.

The product of its digits is 3840, while the sum is 26.

The square root of 121544423 is about 11024.7187265708. The cubic root of 121544423 is about 495.3494427421.

Adding to 121544423 its reverse (324445121), we get a palindrome (445989544).

The spelling of 121544423 in words is "one hundred twenty-one million, five hundred forty-four thousand, four hundred twenty-three".