2165672 has 8 divisors (see below), whose sum is σ = 4060650. Its totient is φ = 1082832.

The previous prime is 2165671. The next prime is 2165687. The reversal of 2165672 is 2765612.

It can be written as a sum of positive squares in only one way, i.e., 1503076 + 662596 = 1226^2 + 814^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×2165672³ = 30471883511824633344, which contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2165671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135347 + ... + 135362.

2^2165672 is an apocalyptic number.

It is an amenable number.

2165672 is a deficient number, since it is larger than the sum of its proper divisors (1894978).

2165672 is a wasteful number, since it uses less digits than its factorization.

2165672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270715 (or 270711 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 2165672 is about 1471.6222341348. The cubic root of 2165672 is about 129.3791302251.

Adding to 2165672 its product of digits (5040), we get a palindrome (2170712).

The spelling of 2165672 in words is "two million, one hundred sixty-five thousand, six hundred seventy-two".