1643112 has 32 divisors (see below), whose sum is σ = 4564800. Its totient is φ = 547632.

The previous prime is 1643099. The next prime is 1643123. The reversal of 1643112 is 2113461.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

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, 3588 + ... + 4019.

It is an arithmetic number, because the mean of its divisors is an integer number (142650).

2^1643112 is an apocalyptic number.

1643112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1643112 is an abundant number, since it is smaller than the sum of its proper divisors (2921688).

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

1643112 is a wasteful number, since it uses less digits than its factorization.

1643112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7622 (or 7612 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1643112 is about 1281.8393035010. The cubic root of 1643112 is about 118.0019151274.

Adding to 1643112 its reverse (2113461), we get a palindrome (3756573).

The spelling of 1643112 in words is "one million, six hundred forty-three thousand, one hundred twelve".