16574421 has 8 divisors (see below), whose sum is σ = 23060160. Its totient is φ = 10569152.

The previous prime is 16574419. The next prime is 16574447. The reversal of 16574421 is 12447561.

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 16574421 - 2¹ = 16574419 is a prime.

It is a super-2 number, since 2×16574421² = 549422862970482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16574521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120036 + ... + 120173.

It is an arithmetic number, because the mean of its divisors is an integer number (2882520).

Almost surely, 2^16574421 is an apocalyptic number.

It is an amenable number.

16574421 is a deficient number, since it is larger than the sum of its proper divisors (6485739).

16574421 is a wasteful number, since it uses less digits than its factorization.

16574421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240235.

The product of its digits is 6720, while the sum is 30.

The square root of 16574421 is about 4071.1694879973. The cubic root of 16574421 is about 254.9643471877.

The spelling of 16574421 in words is "sixteen million, five hundred seventy-four thousand, four hundred twenty-one".