13012501 has 4 divisors (see below), whose sum is σ = 13020832. Its totient is φ = 13004172.

The previous prime is 13012499. The next prime is 13012523. The reversal of 13012501 is 10521031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(13012501) divides (13012501-1)³.

It is a cyclic number.

It is not a de Polignac number, because 13012501 - 2¹ = 13012499 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 (13012001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1041 + ... + 5206.

It is an arithmetic number, because the mean of its divisors is an integer number (3255208).

Almost surely, 2^13012501 is an apocalyptic number.

13012501 is the 2083-rd octagonal number.

It is an amenable number.

13012501 is a deficient number, since it is larger than the sum of its proper divisors (8331).

13012501 is an equidigital number, since it uses as much as digits as its factorization.

13012501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8330.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 13012501 is about 3607.2844356940. The cubic root of 13012501 is about 235.2088139465.

Adding to 13012501 its reverse (10521031), we get a palindrome (23533532).

The spelling of 13012501 in words is "thirteen million, twelve thousand, five hundred one".