13123745 has 16 divisors (see below), whose sum is σ = 16848000. Its totient is φ = 9778944.

The previous prime is 13123741. The next prime is 13123751. The reversal of 13123745 is 54732131.

It is not a de Polignac number, because 13123745 - 2² = 13123741 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13123741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8006 + ... + 9504.

It is an arithmetic number, because the mean of its divisors is an integer number (1053000).

Almost surely, 2^13123745 is an apocalyptic number.

It is an amenable number.

13123745 is a deficient number, since it is larger than the sum of its proper divisors (3724255).

13123745 is a wasteful number, since it uses less digits than its factorization.

13123745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624.

The product of its digits is 2520, while the sum is 26.

The square root of 13123745 is about 3622.6709759513. The cubic root of 13123745 is about 235.8771804194.

Adding to 13123745 its reverse (54732131), we get a palindrome (67855876).

The spelling of 13123745 in words is "thirteen million, one hundred twenty-three thousand, seven hundred forty-five".