123443145 has 48 divisors (see below), whose sum is σ = 248227200. Its totient is φ = 55579392.

The previous prime is 123443143. The next prime is 123443149. The reversal of 123443145 is 541344321.

It is a happy number.

123443145 is a `hidden beast` number, since 1 + 2 + 344 + 314 + 5 = 666.

It is not a de Polignac number, because 123443145 - 2¹ = 123443143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123443143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18181 + ... + 24029.

It is an arithmetic number, because the mean of its divisors is an integer number (5171400).

Almost surely, 2^123443145 is an apocalyptic number.

123443145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123443145 is an abundant number, since it is smaller than the sum of its proper divisors (124784055).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123443145 is a wasteful number, since it uses less digits than its factorization.

123443145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5934 (or 5931 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 123443145 is about 11110.4970635881. The cubic root of 123443145 is about 497.9155152564.

Adding to 123443145 its reverse (541344321), we get a palindrome (664787466).

The spelling of 123443145 in words is "one hundred twenty-three million, four hundred forty-three thousand, one hundred forty-five".