16374521 has 2 divisors, whose sum is σ = 16374522. Its totient is φ = 16374520.

The previous prime is 16374511. The next prime is 16374571. The reversal of 16374521 is 12547361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15912121 + 462400 = 3989^2 + 680^2 .

It is an emirp because it is prime and its reverse (12547361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16374521 - 2¹⁴ = 16358137 is a prime.

It is not a weakly prime, because it can be changed into another prime (16374511) 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 as a sum of consecutive naturals, namely, 8187260 + 8187261.

It is an arithmetic number, because the mean of its divisors is an integer number (8187261).

Almost surely, 2^16374521 is an apocalyptic number.

It is an amenable number.

16374521 is a deficient number, since it is larger than the sum of its proper divisors (1).

16374521 is an equidigital number, since it uses as much as digits as its factorization.

16374521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 29.

The square root of 16374521 is about 4046.5443281892. The cubic root of 16374521 is about 253.9351778288.

The spelling of 16374521 in words is "sixteen million, three hundred seventy-four thousand, five hundred twenty-one".