17490421 has 8 divisors (see below), whose sum is σ = 18869760. Its totient is φ = 16115952.

The previous prime is 17490413. The next prime is 17490427. The reversal of 17490421 is 12409471.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 17490421 - 2³ = 17490413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17490421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17490427) 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 7 ways as a sum of consecutive naturals, for example, 10440 + ... + 11998.

It is an arithmetic number, because the mean of its divisors is an integer number (2358720).

Almost surely, 2^17490421 is an apocalyptic number.

It is an amenable number.

17490421 is a deficient number, since it is larger than the sum of its proper divisors (1379339).

17490421 is a wasteful number, since it uses less digits than its factorization.

17490421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 17490421 is about 4182.1550664699. The cubic root of 17490421 is about 259.5773260650.

Adding to 17490421 its reverse (12409471), we get a palindrome (29899892).

The spelling of 17490421 in words is "seventeen million, four hundred ninety thousand, four hundred twenty-one".