3207681 has 15 divisors (see below), whose sum is σ = 4815921. Its totient is φ = 2127708.

The previous prime is 3207643. The next prime is 3207689. The reversal of 3207681 is 1867023.

The square root of 3207681 is 1791.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-3207681 is a prime.

It is a super-2 number, since 2×3207681² = 20578434795522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3207689) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 16020 + ... + 16218.

Almost surely, 2^3207681 is an apocalyptic number.

3207681 is the 1791-st square number.

3207681 is the 896-th centered octagonal number.

It is an amenable number.

3207681 is a deficient number, since it is larger than the sum of its proper divisors (1608240).

3207681 is an frugal number, since it uses more digits than its factorization.

3207681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The cubic root of 3207681 is about 147.4790700935.

It can be divided in two parts, 320 and 7681, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 3207681 in words is "three million, two hundred seven thousand, six hundred eighty-one".