123423545 has 16 divisors (see below), whose sum is σ = 173205120. Its totient is φ = 82664064.

The previous prime is 123423541. The next prime is 123423569. The reversal of 123423545 is 545324321.

It is a happy number.

It is not a de Polignac number, because 123423545 - 2² = 123423541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123423541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39500 + ... + 42509.

It is an arithmetic number, because the mean of its divisors is an integer number (10825320).

Almost surely, 2^123423545 is an apocalyptic number.

It is an amenable number.

123423545 is a deficient number, since it is larger than the sum of its proper divisors (49781575).

123423545 is an equidigital number, since it uses as much as digits as its factorization.

123423545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82064.

The product of its digits is 14400, while the sum is 29.

The square root of 123423545 is about 11109.6149798272. The cubic root of 123423545 is about 497.8891612598.

Adding to 123423545 its reverse (545324321), we get a palindrome (668747866).

The spelling of 123423545 in words is "one hundred twenty-three million, four hundred twenty-three thousand, five hundred forty-five".