123412545 has 48 divisors (see below), whose sum is σ = 227435520. Its totient is φ = 63491904.

The previous prime is 123412529. The next prime is 123412573. The reversal of 123412545 is 545214321.

It is not a de Polignac number, because 123412545 - 2⁴ = 123412529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 112992 + ... + 114078.

It is an arithmetic number, because the mean of its divisors is an integer number (4738240).

Almost surely, 2^123412545 is an apocalyptic number.

123412545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123412545 is a deficient number, since it is larger than the sum of its proper divisors (104022975).

123412545 is a wasteful number, since it uses less digits than its factorization.

123412545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1124 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 123412545 is about 11109.1199021345. The cubic root of 123412545 is about 497.8743695292.

Adding to 123412545 its reverse (545214321), we get a palindrome (668626866).

The spelling of 123412545 in words is "one hundred twenty-three million, four hundred twelve thousand, five hundred forty-five".