13072523 has 4 divisors (see below), whose sum is σ = 13159248. Its totient is φ = 12985800.

The previous prime is 13072519. The next prime is 13072529. The reversal of 13072523 is 32527031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32527031 = 19 ⋅1711949.

It is a cyclic number.

It is not a de Polignac number, because 13072523 - 2² = 13072519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13072529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43136 + ... + 43437.

It is an arithmetic number, because the mean of its divisors is an integer number (3289812).

Almost surely, 2^13072523 is an apocalyptic number.

13072523 is a deficient number, since it is larger than the sum of its proper divisors (86725).

13072523 is an equidigital number, since it uses as much as digits as its factorization.

13072523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86724.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 13072523 is about 3615.5944186261. The cubic root of 13072523 is about 235.5699039540.

Adding to 13072523 its reverse (32527031), we get a palindrome (45599554).

The spelling of 13072523 in words is "thirteen million, seventy-two thousand, five hundred twenty-three".