3621001 has 4 divisors (see below), whose sum is σ = 3811600. Its totient is φ = 3430404.

The previous prime is 3620999. The next prime is 3621011. The reversal of 3621001 is 1001263.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1001263 = 103 ⋅9721.

It is a cyclic number.

It is not a de Polignac number, because 3621001 - 2¹ = 3620999 is a prime.

It is a super-2 number, since 2×3621001² = 26223296484002, which contains 22 as substring.

It is a Duffinian number.

3621001 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3621011) 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, 95271 + ... + 95308.

It is an arithmetic number, because the mean of its divisors is an integer number (952900).

Almost surely, 2^3621001 is an apocalyptic number.

It is an amenable number.

3621001 is a deficient number, since it is larger than the sum of its proper divisors (190599).

3621001 is a wasteful number, since it uses less digits than its factorization.

3621001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190598.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 3621001 is about 1902.8927978213. The cubic root of 3621001 is about 153.5593322466.

Adding to 3621001 its reverse (1001263), we get a palindrome (4622264).

The spelling of 3621001 in words is "three million, six hundred twenty-one thousand, one".