1667872 has 12 divisors (see below), whose sum is σ = 3283686. Its totient is φ = 833920.

The previous prime is 1667867. The next prime is 1667873. The reversal of 1667872 is 2787661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1263376 + 404496 = 1124^2 + 636^2 .

It is not an unprimeable number, because it can be changed into a prime (1667873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26029 + ... + 26092.

2^1667872 is an apocalyptic number.

It is an amenable number.

1667872 is a deficient number, since it is larger than the sum of its proper divisors (1615814).

1667872 is an equidigital number, since it uses as much as digits as its factorization.

1667872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52131 (or 52123 counting only the distinct ones).

The product of its digits is 28224, while the sum is 37.

The square root of 1667872 is about 1291.4611879573. The cubic root of 1667872 is about 118.5916848761.

The spelling of 1667872 in words is "one million, six hundred sixty-seven thousand, eight hundred seventy-two".