13145423 has 4 divisors (see below), whose sum is σ = 13213728. Its totient is φ = 13077120.

The previous prime is 13145417. The next prime is 13145449. The reversal of 13145423 is 32454131.

13145423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32454131 = 1019 ⋅31849.

It is a cyclic number.

It is not a de Polignac number, because 13145423 - 2²² = 8951119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13145413) 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, 33863 + ... + 34248.

It is an arithmetic number, because the mean of its divisors is an integer number (3303432).

Almost surely, 2^13145423 is an apocalyptic number.

13145423 is a deficient number, since it is larger than the sum of its proper divisors (68305).

13145423 is an equidigital number, since it uses as much as digits as its factorization.

13145423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68304.

The product of its digits is 1440, while the sum is 23.

The square root of 13145423 is about 3625.6617327048. The cubic root of 13145423 is about 236.0069841369.

Adding to 13145423 its reverse (32454131), we get a palindrome (45599554).

It can be divided in two parts, 131 and 45423, that added together give a palindrome (45554).

The spelling of 13145423 in words is "thirteen million, one hundred forty-five thousand, four hundred twenty-three".