1643016 has 32 divisors (see below), whose sum is σ = 4350240. Its totient is φ = 515328.

The previous prime is 1643003. The next prime is 1643021. The reversal of 1643016 is 6103461.

It is a junction number, because it is equal to n+sod(n) for n = 1642983 and 1643001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1606 + ... + 2421.

It is an arithmetic number, because the mean of its divisors is an integer number (135945).

2^1643016 is an apocalyptic number.

It is an amenable number.

1643016 is an abundant number, since it is smaller than the sum of its proper divisors (2707224).

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

1643016 is a wasteful number, since it uses less digits than its factorization.

1643016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4053 (or 4049 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1643016 is about 1281.8018567626. The cubic root of 1643016 is about 117.9996169671. Note that the first 3 decimals are identical.

Adding to 1643016 its reverse (6103461), we get a palindrome (7746477).

The spelling of 1643016 in words is "one million, six hundred forty-three thousand, sixteen".