17421031 has 2 divisors, whose sum is σ = 17421032. Its totient is φ = 17421030.

The previous prime is 17421029. The next prime is 17421037. The reversal of 17421031 is 13012471.

It is a weak prime.

It is an emirp because it is prime and its reverse (13012471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17421031 - 2¹ = 17421029 is a prime.

It is a super-2 number, since 2×17421031² = 606984642205922, which contains 22 as substring.

Together with 17421029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17421037) 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, 8710515 + 8710516.

It is an arithmetic number, because the mean of its divisors is an integer number (8710516).

Almost surely, 2^17421031 is an apocalyptic number.

17421031 is a deficient number, since it is larger than the sum of its proper divisors (1).

17421031 is an equidigital number, since it uses as much as digits as its factorization.

17421031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 17421031 is about 4173.8508598176. The cubic root of 17421031 is about 259.2335961428.

The spelling of 17421031 in words is "seventeen million, four hundred twenty-one thousand, thirty-one".