13606021 has 16 divisors (see below), whose sum is σ = 16107840. Its totient is φ = 11397360.

The previous prime is 13606009. The next prime is 13606037. The reversal of 13606021 is 12060631.

It is not a de Polignac number, because 13606021 - 2²¹ = 11508869 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13606021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13606051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23886 + ... + 24448.

It is an arithmetic number, because the mean of its divisors is an integer number (1006740).

Almost surely, 2^13606021 is an apocalyptic number.

13606021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13606021 is a deficient number, since it is larger than the sum of its proper divisors (2501819).

13606021 is an equidigital number, since it uses as much as digits as its factorization.

13606021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 13606021 is about 3688.6340290140. The cubic root of 13606021 is about 238.7318584938.

Adding to 13606021 its reverse (12060631), we get a palindrome (25666652).

It can be divided in two parts, 1360 and 6021, that added together give a triangular number (7381 = T₁₂₁).

The spelling of 13606021 in words is "thirteen million, six hundred six thousand, twenty-one".