13608421 has 8 divisors (see below), whose sum is σ = 13829760. Its totient is φ = 13388928.

The previous prime is 13608401. The next prime is 13608457. The reversal of 13608421 is 12480631.

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 13608421 - 2⁷ = 13608293 is a prime.

It is a super-2 number, since 2×13608421² = 370378244226482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13608401) 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, 22890 + ... + 23476.

It is an arithmetic number, because the mean of its divisors is an integer number (1728720).

Almost surely, 2^13608421 is an apocalyptic number.

It is an amenable number.

13608421 is a deficient number, since it is larger than the sum of its proper divisors (221339).

13608421 is an equidigital number, since it uses as much as digits as its factorization.

13608421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 13608421 is about 3688.9593383500. The cubic root of 13608421 is about 238.7458945047.

The spelling of 13608421 in words is "thirteen million, six hundred eight thousand, four hundred twenty-one".