3551641 has 2 divisors, whose sum is σ = 3551642. Its totient is φ = 3551640.

The previous prime is 3551629. The next prime is 3551663. The reversal of 3551641 is 1461553.

3551641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2903616 + 648025 = 1704^2 + 805^2 .

It is an emirp because it is prime and its reverse (1461553) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3551641 - 2¹⁵ = 3518873 is a prime.

It is a super-2 number, since 2×3551641² = 25228307585762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3551621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1775820 + 1775821.

It is an arithmetic number, because the mean of its divisors is an integer number (1775821).

Almost surely, 2^3551641 is an apocalyptic number.

It is an amenable number.

3551641 is a deficient number, since it is larger than the sum of its proper divisors (1).

3551641 is an equidigital number, since it uses as much as digits as its factorization.

3551641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 3551641 is about 1884.5797940124. The cubic root of 3551641 is about 152.5725320113.

The spelling of 3551641 in words is "three million, five hundred fifty-one thousand, six hundred forty-one".