16451 has 2 divisors, whose sum is σ = 16452. Its totient is φ = 16450.

The previous prime is 16447. The next prime is 16453. The reversal of 16451 is 15461.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (15461) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16451 - 2² = 16447 is a prime.

Together with 16453, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₁₉₀₇ and since 16451 and 1907 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (16453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8225 + 8226.

It is an arithmetic number, because the mean of its divisors is an integer number (8226).

2¹⁶⁴⁵¹ is an apocalyptic number.

16451 is a deficient number, since it is larger than the sum of its proper divisors (1).

16451 is an equidigital number, since it uses as much as digits as its factorization.

16451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120, while the sum is 17.

The square root of 16451 is about 128.2614517304. The cubic root of 16451 is about 25.4329907974.

Subtracting from 16451 its reverse (15461), we obtain a triangular number (990 = T₄₄).

The spelling of 16451 in words is "sixteen thousand, four hundred fifty-one".