13045821 has 16 divisors (see below), whose sum is σ = 17762304. Its totient is φ = 8515584.

The previous prime is 13045811. The next prime is 13045841. The reversal of 13045821 is 12854031.

It is not a de Polignac number, because 13045821 - 2⁹ = 13045309 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13045791 and 13045800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13045801) 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 15 ways as a sum of consecutive naturals, for example, 36781 + ... + 37133.

It is an arithmetic number, because the mean of its divisors is an integer number (1110144).

Almost surely, 2^13045821 is an apocalyptic number.

It is an amenable number.

13045821 is a deficient number, since it is larger than the sum of its proper divisors (4716483).

13045821 is a wasteful number, since it uses less digits than its factorization.

13045821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 13045821 is about 3611.8999155569. The cubic root of 13045821 is about 235.4094025412.

Adding to 13045821 its reverse (12854031), we get a palindrome (25899852).

The spelling of 13045821 in words is "thirteen million, forty-five thousand, eight hundred twenty-one".