13081501 has 4 divisors (see below), whose sum is σ = 13400604. Its totient is φ = 12762400.

The previous prime is 13081493. The next prime is 13081507. The reversal of 13081501 is 10518031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1758276 + 11323225 = 1326^2 + 3365^2 .

It is a cyclic number.

It is not a de Polignac number, because 13081501 - 2³ = 13081493 is a prime.

It is a super-2 number, since 2×13081501² = 342251336826002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13081507) 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, 159490 + ... + 159571.

It is an arithmetic number, because the mean of its divisors is an integer number (3350151).

Almost surely, 2^13081501 is an apocalyptic number.

It is an amenable number.

13081501 is a deficient number, since it is larger than the sum of its proper divisors (319103).

13081501 is an equidigital number, since it uses as much as digits as its factorization.

13081501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319102.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 13081501 is about 3616.8357717762. The cubic root of 13081501 is about 235.6238201622.

Adding to 13081501 its reverse (10518031), we get a palindrome (23599532).

It can be divided in two parts, 1308 and 1501, that added together give a square (2809 = 53²).

The spelling of 13081501 in words is "thirteen million, eighty-one thousand, five hundred one".