16421286 has 64 divisors (see below), whose sum is σ = 40296960. Its totient is φ = 4354560.

The previous prime is 16421267. The next prime is 16421297. The reversal of 16421286 is 68212461.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 77721 + ... + 77931.

It is an arithmetic number, because the mean of its divisors is an integer number (629640).

Almost surely, 2^16421286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16421286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20148480).

16421286 is an abundant number, since it is smaller than the sum of its proper divisors (23875674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16421286 is a wasteful number, since it uses less digits than its factorization.

16421286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349.

The product of its digits is 4608, while the sum is 30.

The square root of 16421286 is about 4052.3185955697. The cubic root of 16421286 is about 254.1766910794.

The spelling of 16421286 in words is "sixteen million, four hundred twenty-one thousand, two hundred eighty-six".