3672121 has 4 divisors (see below), whose sum is σ = 3676644. Its totient is φ = 3667600.

The previous prime is 3672113. The next prime is 3672127. The reversal of 3672121 is 1212763.

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: 1212763 = 17 ⋅71339.

It can be written as a sum of positive squares in 2 ways, for example, as 1537600 + 2134521 = 1240^2 + 1461^2 .

It is a cyclic number.

It is not a de Polignac number, because 3672121 - 2³ = 3672113 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3672092 and 3672101.

It is not an unprimeable number, because it can be changed into a prime (3672127) 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, 670 + ... + 2791.

It is an arithmetic number, because the mean of its divisors is an integer number (919161).

Almost surely, 2^3672121 is an apocalyptic number.

It is an amenable number.

3672121 is a deficient number, since it is larger than the sum of its proper divisors (4523).

3672121 is a wasteful number, since it uses less digits than its factorization.

3672121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4522.

The product of its digits is 504, while the sum is 22.

The square root of 3672121 is about 1916.2779026018. The cubic root of 3672121 is about 154.2785900019.

Adding to 3672121 its reverse (1212763), we get a palindrome (4884884).

The spelling of 3672121 in words is "three million, six hundred seventy-two thousand, one hundred twenty-one".