123436545 has 8 divisors (see below), whose sum is σ = 197498496. Its totient is φ = 65832816.

The previous prime is 123436543. The next prime is 123436549. The reversal of 123436545 is 545634321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123436545 - 2¹ = 123436543 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (123436543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4114537 + ... + 4114566.

It is an arithmetic number, because the mean of its divisors is an integer number (24687312).

Almost surely, 2^123436545 is an apocalyptic number.

123436545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123436545 is a deficient number, since it is larger than the sum of its proper divisors (74061951).

123436545 is an equidigital number, since it uses as much as digits as its factorization.

123436545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8229111.

The product of its digits is 43200, while the sum is 33.

The square root of 123436545 is about 11110.2000432035. The cubic root of 123436545 is about 497.9066412629.

The spelling of 123436545 in words is "one hundred twenty-three million, four hundred thirty-six thousand, five hundred forty-five".