13581003 has 8 divisors (see below), whose sum is σ = 18176400. Its totient is φ = 9019808.

The previous prime is 13580989. The next prime is 13581053. The reversal of 13581003 is 30018531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13581003 - 2⁶ = 13580939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13581053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7608 + ... + 9221.

It is an arithmetic number, because the mean of its divisors is an integer number (2272050).

Almost surely, 2^13581003 is an apocalyptic number.

13581003 is a deficient number, since it is larger than the sum of its proper divisors (4595397).

13581003 is a wasteful number, since it uses less digits than its factorization.

13581003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17101.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 13581003 is about 3685.2412404075. The cubic root of 13581003 is about 238.5854463999.

Adding to 13581003 its reverse (30018531), we get a palindrome (43599534).

The spelling of 13581003 in words is "thirteen million, five hundred eighty-one thousand, three".