16421087 has 2 divisors, whose sum is σ = 16421088. Its totient is φ = 16421086.

The previous prime is 16421071. The next prime is 16421089. The reversal of 16421087 is 78012461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16421087 - 2⁴ = 16421071 is a prime.

Together with 16421089, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16421089) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8210543 + 8210544.

It is an arithmetic number, because the mean of its divisors is an integer number (8210544).

Almost surely, 2^16421087 is an apocalyptic number.

16421087 is a deficient number, since it is larger than the sum of its proper divisors (1).

16421087 is an equidigital number, since it uses as much as digits as its factorization.

16421087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 16421087 is about 4052.2940416510. The cubic root of 16421087 is about 254.1756643355.

The spelling of 16421087 in words is "sixteen million, four hundred twenty-one thousand, eighty-seven".