17422421 has 4 divisors (see below), whose sum is σ = 17539500. Its totient is φ = 17305344.

The previous prime is 17422397. The next prime is 17422459. The reversal of 17422421 is 12422471.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6604900 + 10817521 = 2570^2 + 3289^2 .

It is a cyclic number.

It is not a de Polignac number, because 17422421 - 2⁶ = 17422357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17422021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58316 + ... + 58613.

It is an arithmetic number, because the mean of its divisors is an integer number (4384875).

Almost surely, 2^17422421 is an apocalyptic number.

It is an amenable number.

17422421 is a deficient number, since it is larger than the sum of its proper divisors (117079).

17422421 is a wasteful number, since it uses less digits than its factorization.

17422421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117078.

The product of its digits is 896, while the sum is 23.

The square root of 17422421 is about 4174.0173693937. The cubic root of 17422421 is about 259.2404905897.

Adding to 17422421 its reverse (12422471), we get a palindrome (29844892).

The spelling of 17422421 in words is "seventeen million, four hundred twenty-two thousand, four hundred twenty-one".