3672181 has 2 divisors, whose sum is σ = 3672182. Its totient is φ = 3672180.

The previous prime is 3672143. The next prime is 3672197. The reversal of 3672181 is 1812763.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 933156 = 1655^2 + 966^2 .

It is an emirp because it is prime and its reverse (1812763) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3672181 - 2⁹ = 3671669 is a prime.

It is a super-2 number, since 2×3672181² = 26969826593522, which contains 22 as substring.

It is an Ulam number.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3672281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1836090 + 1836091.

It is an arithmetic number, because the mean of its divisors is an integer number (1836091).

Almost surely, 2^3672181 is an apocalyptic number.

It is an amenable number.

3672181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3672181 is an equidigital number, since it uses as much as digits as its factorization.

3672181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 3672181 is about 1916.2935578872. The cubic root of 3672181 is about 154.2794302670.

The spelling of 3672181 in words is "three million, six hundred seventy-two thousand, one hundred eighty-one".