3681215 has 4 divisors (see below), whose sum is σ = 4417464. Its totient is φ = 2944968.

The previous prime is 3681199. The next prime is 3681217. The reversal of 3681215 is 5121863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5121863 = 941 ⋅5443.

It is a cyclic number.

It is not a de Polignac number, because 3681215 - 2⁴ = 3681199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3681217) 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, 368117 + ... + 368126.

It is an arithmetic number, because the mean of its divisors is an integer number (1104366).

Almost surely, 2^3681215 is an apocalyptic number.

3681215 is a deficient number, since it is larger than the sum of its proper divisors (736249).

3681215 is an equidigital number, since it uses as much as digits as its factorization.

3681215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736248.

The product of its digits is 1440, while the sum is 26.

The square root of 3681215 is about 1918.6492644566. The cubic root of 3681215 is about 154.4058418821.

The spelling of 3681215 in words is "three million, six hundred eighty-one thousand, two hundred fifteen".