3651121 has 4 divisors (see below), whose sum is σ = 3673152. Its totient is φ = 3629092.

The previous prime is 3651119. The next prime is 3651127. The reversal of 3651121 is 1211563.

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.

It is a cyclic number.

It is not a de Polignac number, because 3651121 - 2¹ = 3651119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3651127) 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, 10765 + ... + 11098.

It is an arithmetic number, because the mean of its divisors is an integer number (918288).

Almost surely, 2^3651121 is an apocalyptic number.

It is an amenable number.

3651121 is a deficient number, since it is larger than the sum of its proper divisors (22031).

3651121 is a wasteful number, since it uses less digits than its factorization.

3651121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22030.

The product of its digits is 180, while the sum is 19.

The square root of 3651121 is about 1910.7906740405. The cubic root of 3651121 is about 153.9839332201.

Adding to 3651121 its reverse (1211563), we get a palindrome (4862684).

The spelling of 3651121 in words is "three million, six hundred fifty-one thousand, one hundred twenty-one".