2001672 has 40 divisors (see below), whose sum is σ = 5608350. Its totient is φ = 667008.

The previous prime is 2001653. The next prime is 2001673. The reversal of 2001672 is 2761002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1285956 + 715716 = 1134^2 + 846^2 .

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

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2001673) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 897 + ... + 2192.

2^2001672 is an apocalyptic number.

It is an amenable number.

2001672 is an abundant number, since it is smaller than the sum of its proper divisors (3606678).

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

2001672 is a wasteful number, since it uses less digits than its factorization.

2001672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107 (or 3094 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 2001672 is about 1414.8045801453. The cubic root of 2001672 is about 126.0272050100.

Adding to 2001672 its reverse (2761002), we get a palindrome (4762674).

The spelling of 2001672 in words is "two million, one thousand, six hundred seventy-two".