1667712 has 64 divisors (see below), whose sum is σ = 4577760. Its totient is φ = 537600.

The previous prime is 1667711. The next prime is 1667723. The reversal of 1667712 is 2177661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 1667712.

It is not an unprimeable number, because it can be changed into a prime (1667711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16462 + ... + 16562.

2^1667712 is an apocalyptic number.

1667712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1667712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2288880).

1667712 is an abundant number, since it is smaller than the sum of its proper divisors (2910048).

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

1667712 is a wasteful number, since it uses less digits than its factorization.

1667712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 149 counting only the distinct ones).

The product of its digits is 3528, while the sum is 30.

The square root of 1667712 is about 1291.3992411334. The cubic root of 1667712 is about 118.5878925634.

The spelling of 1667712 in words is "one million, six hundred sixty-seven thousand, seven hundred twelve".