3103621 has 4 divisors (see below), whose sum is σ = 3107500. Its totient is φ = 3099744.

The previous prime is 3103601. The next prime is 3103649. The reversal of 3103621 is 1263013.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1263013 = 59 ⋅21407.

It can be written as a sum of positive squares in 2 ways, for example, as 314721 + 2788900 = 561^2 + 1670^2 .

It is a cyclic number.

It is not a de Polignac number, because 3103621 - 2⁵ = 3103589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3103595 and 3103604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3103601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246 + ... + 2503.

It is an arithmetic number, because the mean of its divisors is an integer number (776875).

Almost surely, 2^3103621 is an apocalyptic number.

It is an amenable number.

3103621 is a deficient number, since it is larger than the sum of its proper divisors (3879).

3103621 is a wasteful number, since it uses less digits than its factorization.

3103621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3878.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 3103621 is about 1761.7096809634. The cubic root of 3103621 is about 145.8667233114.

Adding to 3103621 its reverse (1263013), we get a palindrome (4366634).

The spelling of 3103621 in words is "three million, one hundred three thousand, six hundred twenty-one".