17421029 has 2 divisors, whose sum is σ = 17421030. Its totient is φ = 17421028.

The previous prime is 17421013. The next prime is 17421031. The reversal of 17421029 is 92012471.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13912900 + 3508129 = 3730^2 + 1873^2 .

It is an emirp because it is prime and its reverse (92012471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17421029 - 2⁴ = 17421013 is a prime.

Together with 17421031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 17420989 and 17421007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17421059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8710514 + 8710515.

It is an arithmetic number, because the mean of its divisors is an integer number (8710515).

Almost surely, 2^17421029 is an apocalyptic number.

It is an amenable number.

17421029 is a deficient number, since it is larger than the sum of its proper divisors (1).

17421029 is an equidigital number, since it uses as much as digits as its factorization.

17421029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 17421029 is about 4173.8506202307. The cubic root of 17421029 is about 259.2335862225.

The spelling of 17421029 in words is "seventeen million, four hundred twenty-one thousand, twenty-nine".