123412345 has 16 divisors (see below), whose sum is σ = 169561728. Its totient is φ = 84470400.

The previous prime is 123412343. The next prime is 123412363. The reversal of 123412345 is 543214321.

It is not a de Polignac number, because 123412345 - 2¹ = 123412343 is a prime.

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 (123412343) 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, 18102 + ... + 23968.

It is an arithmetic number, because the mean of its divisors is an integer number (10597608).

Almost surely, 2^123412345 is an apocalyptic number.

It is an amenable number.

123412345 is a deficient number, since it is larger than the sum of its proper divisors (46149383).

123412345 is an equidigital number, since it uses as much as digits as its factorization.

123412345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6480.

The product of its digits is 2880, while the sum is 25.

The square root of 123412345 is about 11109.1109005176. The cubic root of 123412345 is about 497.8741005805.

Adding to 123412345 its reverse (543214321), we get a palindrome (666626666).

The spelling of 123412345 in words is "one hundred twenty-three million, four hundred twelve thousand, three hundred forty-five".