123545121 has 24 divisors (see below), whose sum is σ = 199957824. Its totient is φ = 67525920.

The previous prime is 123545111. The next prime is 123545129. The reversal of 123545121 is 121545321.

It is a happy number.

It is not a de Polignac number, because 123545121 - 2⁶ = 123545057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123545091 and 123545100.

It is not an unprimeable number, because it can be changed into a prime (123545129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14890 + ... + 21651.

It is an arithmetic number, because the mean of its divisors is an integer number (8331576).

Almost surely, 2^123545121 is an apocalyptic number.

It is an amenable number.

123545121 is a deficient number, since it is larger than the sum of its proper divisors (76412703).

123545121 is a wasteful number, since it uses less digits than its factorization.

123545121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36581 (or 36574 counting only the distinct ones).

The product of its digits is 1200, while the sum is 24.

The square root of 123545121 is about 11115.0852898212. The cubic root of 123545121 is about 498.0525863406.

The spelling of 123545121 in words is "one hundred twenty-three million, five hundred forty-five thousand, one hundred twenty-one".