2016421 has 16 divisors (see below), whose sum is σ = 2395008. Its totient is φ = 1676800.

The previous prime is 2016419. The next prime is 2016439. The reversal of 2016421 is 1246102.

It is a cyclic number.

It is not a de Polignac number, because 2016421 - 2¹ = 2016419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2016395 and 2016404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7536 + ... + 7798.

It is an arithmetic number, because the mean of its divisors is an integer number (149688).

2^2016421 is an apocalyptic number.

It is an amenable number.

2016421 is a deficient number, since it is larger than the sum of its proper divisors (378587).

2016421 is a wasteful number, since it uses less digits than its factorization.

2016421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2016421 is about 1420.0073943469. The cubic root of 2016421 is about 126.3359849502.

The spelling of 2016421 in words is "two million, sixteen thousand, four hundred twenty-one".