3622681 has 4 divisors (see below), whose sum is σ = 3626532. Its totient is φ = 3618832.

The previous prime is 3622679. The next prime is 3622687. The reversal of 3622681 is 1862263.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1974025 + 1648656 = 1405^2 + 1284^2 .

It is a cyclic number.

It is not a de Polignac number, because 3622681 - 2¹ = 3622679 is a prime.

It is a super-2 number, since 2×3622681² = 26247635255522, which contains 22 as substring.

It is a Duffinian number.

3622681 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3622687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531 + ... + 2743.

It is an arithmetic number, because the mean of its divisors is an integer number (906633).

Almost surely, 2^3622681 is an apocalyptic number.

It is an amenable number.

3622681 is a deficient number, since it is larger than the sum of its proper divisors (3851).

3622681 is a wasteful number, since it uses less digits than its factorization.

3622681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3850.

The product of its digits is 3456, while the sum is 28.

The square root of 3622681 is about 1903.3341798013. The cubic root of 3622681 is about 153.5830770427.

The spelling of 3622681 in words is "three million, six hundred twenty-two thousand, six hundred eighty-one".