3671557 has 4 divisors (see below), whose sum is σ = 3687820. Its totient is φ = 3655296.

The previous prime is 3671543. The next prime is 3671561. The reversal of 3671557 is 7551763.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7551763 = 233 ⋅32411.

It can be written as a sum of positive squares in 2 ways, for example, as 1454436 + 2217121 = 1206^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 3671557 - 2¹⁹ = 3147269 is a prime.

It is a Duffinian number.

3671557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3671527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7788 + ... + 8245.

It is an arithmetic number, because the mean of its divisors is an integer number (921955).

Almost surely, 2^3671557 is an apocalyptic number.

It is an amenable number.

3671557 is a deficient number, since it is larger than the sum of its proper divisors (16263).

3671557 is a wasteful number, since it uses less digits than its factorization.

3671557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16262.

The product of its digits is 22050, while the sum is 34.

The square root of 3671557 is about 1916.1307366670. The cubic root of 3671557 is about 154.2706910628.

The spelling of 3671557 in words is "three million, six hundred seventy-one thousand, five hundred fifty-seven".