13531145 has 8 divisors (see below), whose sum is σ = 16290504. Its totient is φ = 10789504.

The previous prime is 13531129. The next prime is 13531157. The reversal of 13531145 is 54113531.

It can be written as a sum of positive squares in 4 ways, for example, as 942841 + 12588304 = 971^2 + 3548^2 .

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 13531145 - 2⁴ = 13531129 is a prime.

It is a super-2 number, since 2×13531145² = 366183770022050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13531145.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2684 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (2036313).

Almost surely, 2^13531145 is an apocalyptic number.

It is an amenable number.

13531145 is a deficient number, since it is larger than the sum of its proper divisors (2759359).

13531145 is an equidigital number, since it uses as much as digits as its factorization.

13531145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8859.

The product of its digits is 900, while the sum is 23.

The square root of 13531145 is about 3678.4704701819. The cubic root of 13531145 is about 238.2931268128.

Adding to 13531145 its reverse (54113531), we get a palindrome (67644676).

The spelling of 13531145 in words is "thirteen million, five hundred thirty-one thousand, one hundred forty-five".