17003421 has 12 divisors (see below), whose sum is σ = 24814972. Its totient is φ = 11218176.

The previous prime is 17003419. The next prime is 17003429. The reversal of 17003421 is 12430071.

It can be written as a sum of positive squares in 2 ways, for example, as 9922500 + 7080921 = 3150^2 + 2661^2 .

It is not a de Polignac number, because 17003421 - 2¹ = 17003419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 17003394 and 17003403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17003429) 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 11 ways as a sum of consecutive naturals, for example, 8866 + ... + 10611.

Almost surely, 2^17003421 is an apocalyptic number.

It is an amenable number.

17003421 is a deficient number, since it is larger than the sum of its proper divisors (7811551).

17003421 is a wasteful number, since it uses less digits than its factorization.

17003421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19580 (or 19577 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 17003421 is about 4123.5204619354. The cubic root of 17003421 is about 257.1454056626.

Adding to 17003421 its reverse (12430071), we get a palindrome (29433492).

It can be divided in two parts, 17003 and 421, that added together give a square (17424 = 132²).

The spelling of 17003421 in words is "seventeen million, three thousand, four hundred twenty-one".