16474321 has 2 divisors, whose sum is σ = 16474322. Its totient is φ = 16474320.

The previous prime is 16474319. The next prime is 16474327. The reversal of 16474321 is 12347461.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12110400 + 4363921 = 3480^2 + 2089^2 .

It is a cyclic number.

It is not a de Polignac number, because 16474321 - 2¹ = 16474319 is a prime.

It is a super-2 number, since 2×16474321² = 542806504822082, which contains 22 as substring.

Together with 16474319, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16474321.

It is not a weakly prime, because it can be changed into another prime (16474327) 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, 8237160 + 8237161.

It is an arithmetic number, because the mean of its divisors is an integer number (8237161).

Almost surely, 2^16474321 is an apocalyptic number.

It is an amenable number.

16474321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16474321 is an equidigital number, since it uses as much as digits as its factorization.

16474321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 28.

The square root of 16474321 is about 4058.8571051467. The cubic root of 16474321 is about 254.4500309105.

The spelling of 16474321 in words is "sixteen million, four hundred seventy-four thousand, three hundred twenty-one".