3672581 has 4 divisors (see below), whose sum is σ = 4006464. Its totient is φ = 3338700.

The previous prime is 3672577. The next prime is 3672593. The reversal of 3672581 is 1852763.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1852763 = 11 ⋅168433.

It is a cyclic number.

It is not a de Polignac number, because 3672581 - 2² = 3672577 is a prime.

It is a super-2 number, since 2×3672581² = 26975702403122, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3672511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166925 + ... + 166946.

It is an arithmetic number, because the mean of its divisors is an integer number (1001616).

Almost surely, 2^3672581 is an apocalyptic number.

It is an amenable number.

3672581 is a deficient number, since it is larger than the sum of its proper divisors (333883).

3672581 is a wasteful number, since it uses less digits than its factorization.

3672581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333882.

The product of its digits is 10080, while the sum is 32.

The square root of 3672581 is about 1916.3979231882. The cubic root of 3672581 is about 154.2850318002.

The spelling of 3672581 in words is "three million, six hundred seventy-two thousand, five hundred eighty-one".