16975421 has 8 divisors (see below), whose sum is σ = 17388000. Its totient is φ = 16567120.

The previous prime is 16975397. The next prime is 16975457. The reversal of 16975421 is 12457961.

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 16975421 - 2²² = 12781117 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 (16975471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7826 + ... + 9756.

It is an arithmetic number, because the mean of its divisors is an integer number (2173500).

Almost surely, 2^16975421 is an apocalyptic number.

It is an amenable number.

16975421 is a deficient number, since it is larger than the sum of its proper divisors (412579).

16975421 is a wasteful number, since it uses less digits than its factorization.

16975421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139.

The product of its digits is 15120, while the sum is 35.

The square root of 16975421 is about 4120.1239059038. The cubic root of 16975421 is about 257.0041786479.

The spelling of 16975421 in words is "sixteen million, nine hundred seventy-five thousand, four hundred twenty-one".