123143645 has 16 divisors (see below), whose sum is σ = 151787520. Its totient is φ = 95868864.

The previous prime is 123143611. The next prime is 123143651. The reversal of 123143645 is 546341321.

It is a cyclic number.

It is not a de Polignac number, because 123143645 - 2¹⁸ = 122881501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31826 + ... + 35484.

It is an arithmetic number, because the mean of its divisors is an integer number (9486720).

Almost surely, 2^123143645 is an apocalyptic number.

It is an amenable number.

123143645 is a deficient number, since it is larger than the sum of its proper divisors (28643875).

123143645 is a wasteful number, since it uses less digits than its factorization.

123143645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844.

The product of its digits is 8640, while the sum is 29.

The square root of 123143645 is about 11097.0106334995. The cubic root of 123143645 is about 497.5125052621.

Adding to 123143645 its reverse (546341321), we get a palindrome (669484966).

The spelling of 123143645 in words is "one hundred twenty-three million, one hundred forty-three thousand, six hundred forty-five".