3661201 has 4 divisors (see below), whose sum is σ = 3694900. Its totient is φ = 3627504.

The previous prime is 3661181. The next prime is 3661211. The reversal of 3661201 is 1021663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3240000 + 421201 = 1800^2 + 649^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661201 - 2²¹ = 1564049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3661211) 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, 16686 + ... + 16903.

It is an arithmetic number, because the mean of its divisors is an integer number (923725).

Almost surely, 2^3661201 is an apocalyptic number.

It is an amenable number.

3661201 is a deficient number, since it is larger than the sum of its proper divisors (33699).

3661201 is a wasteful number, since it uses less digits than its factorization.

3661201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33698.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 3661201 is about 1913.4265076036. The cubic root of 3661201 is about 154.1255090846.

Adding to 3661201 its reverse (1021663), we get a palindrome (4682864).

The spelling of 3661201 in words is "three million, six hundred sixty-one thousand, two hundred one".