123642341 has 4 divisors (see below), whose sum is σ = 127905900. Its totient is φ = 119378784.

The previous prime is 123642331. The next prime is 123642359. The reversal of 123642341 is 143246321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 143246321 = 1223 ⋅117127.

It can be written as a sum of positive squares in 2 ways, for example, as 32821441 + 90820900 = 5729^2 + 9530^2 .

It is a cyclic number.

It is not a de Polignac number, because 123642341 - 2¹⁸ = 123380197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123642341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123642301) 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, 2131736 + ... + 2131793.

It is an arithmetic number, because the mean of its divisors is an integer number (31976475).

Almost surely, 2^123642341 is an apocalyptic number.

It is an amenable number.

123642341 is a deficient number, since it is larger than the sum of its proper divisors (4263559).

123642341 is an equidigital number, since it uses as much as digits as its factorization.

123642341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4263558.

The product of its digits is 3456, while the sum is 26.

The square root of 123642341 is about 11119.4577655567. The cubic root of 123642341 is about 498.1831944309.

Adding to 123642341 its reverse (143246321), we get a palindrome (266888662).

The spelling of 123642341 in words is "one hundred twenty-three million, six hundred forty-two thousand, three hundred forty-one".