17143421 has 2 divisors, whose sum is σ = 17143422. Its totient is φ = 17143420.

The previous prime is 17143409. The next prime is 17143457. The reversal of 17143421 is 12434171.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17131321 + 12100 = 4139^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 17143421 - 2²² = 12949117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17143471) 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 as a sum of consecutive naturals, namely, 8571710 + 8571711.

It is an arithmetic number, because the mean of its divisors is an integer number (8571711).

Almost surely, 2^17143421 is an apocalyptic number.

It is an amenable number.

17143421 is a deficient number, since it is larger than the sum of its proper divisors (1).

17143421 is an equidigital number, since it uses as much as digits as its factorization.

17143421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 23.

The square root of 17143421 is about 4140.4614477133. The cubic root of 17143421 is about 257.8492248461.

Adding to 17143421 its reverse (12434171), we get a palindrome (29577592).

The spelling of 17143421 in words is "seventeen million, one hundred forty-three thousand, four hundred twenty-one".