123242345 has 4 divisors (see below), whose sum is σ = 147890820. Its totient is φ = 98593872.

The previous prime is 123242263. The next prime is 123242347. The reversal of 123242345 is 543242321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543242321 = 2557 ⋅212453.

It can be written as a sum of positive squares in 2 ways, for example, as 75203584 + 48038761 = 8672^2 + 6931^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123242345 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123242347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12324230 + ... + 12324239.

It is an arithmetic number, because the mean of its divisors is an integer number (36972705).

Almost surely, 2^123242345 is an apocalyptic number.

It is an amenable number.

123242345 is a deficient number, since it is larger than the sum of its proper divisors (24648475).

123242345 is an equidigital number, since it uses as much as digits as its factorization.

123242345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24648474.

The product of its digits is 5760, while the sum is 26.

The square root of 123242345 is about 11101.4568863731. The cubic root of 123242345 is about 497.6453890202.

Adding to 123242345 its reverse (543242321), we get a palindrome (666484666).

The spelling of 123242345 in words is "one hundred twenty-three million, two hundred forty-two thousand, three hundred forty-five".