13004531 has 8 divisors (see below), whose sum is σ = 14131200. Its totient is φ = 11922120.

The previous prime is 13004527. The next prime is 13004539. The reversal of 13004531 is 13540031.

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

It is not a de Polignac number, because 13004531 - 2² = 13004527 is a prime.

It is a super-2 number, since 2×13004531² = 338235653059922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13004539) 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, 10451 + ... + 11628.

It is an arithmetic number, because the mean of its divisors is an integer number (1766400).

Almost surely, 2^13004531 is an apocalyptic number.

13004531 is a deficient number, since it is larger than the sum of its proper divisors (1126669).

13004531 is a wasteful number, since it uses less digits than its factorization.

13004531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22129.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 13004531 is about 3606.1795573709. The cubic root of 13004531 is about 235.1607832848.

Adding to 13004531 its reverse (13540031), we get a palindrome (26544562).

The spelling of 13004531 in words is "thirteen million, four thousand, five hundred thirty-one".