123864145 has 4 divisors (see below), whose sum is σ = 148636980. Its totient is φ = 99091312.

The previous prime is 123864121. The next prime is 123864149. The reversal of 123864145 is 541468321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541468321 = 227 ⋅2385323.

It can be written as a sum of positive squares in 2 ways, for example, as 69089344 + 54774801 = 8312^2 + 7401^2 .

It is a cyclic number.

It is not a de Polignac number, because 123864145 - 2⁹ = 123863633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123864145.

It is not an unprimeable number, because it can be changed into a prime (123864149) 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, 12386410 + ... + 12386419.

It is an arithmetic number, because the mean of its divisors is an integer number (37159245).

Almost surely, 2^123864145 is an apocalyptic number.

It is an amenable number.

123864145 is a deficient number, since it is larger than the sum of its proper divisors (24772835).

123864145 is an equidigital number, since it uses as much as digits as its factorization.

123864145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24772834.

The product of its digits is 23040, while the sum is 34.

The square root of 123864145 is about 11129.4269843510. The cubic root of 123864145 is about 498.4809161089.

The spelling of 123864145 in words is "one hundred twenty-three million, eight hundred sixty-four thousand, one hundred forty-five".