3655671 has 4 divisors (see below), whose sum is σ = 4874232. Its totient is φ = 2437112.

The previous prime is 3655667. The next prime is 3655681. The reversal of 3655671 is 1765563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1765563 = 3 ⋅588521.

It is a cyclic number.

It is not a de Polignac number, because 3655671 - 2² = 3655667 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3655651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 609276 + ... + 609281.

It is an arithmetic number, because the mean of its divisors is an integer number (1218558).

Almost surely, 2^3655671 is an apocalyptic number.

3655671 is a deficient number, since it is larger than the sum of its proper divisors (1218561).

3655671 is a wasteful number, since it uses less digits than its factorization.

3655671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1218560.

The product of its digits is 18900, while the sum is 33.

The square root of 3655671 is about 1911.9809099465. The cubic root of 3655671 is about 154.0478712142.

The spelling of 3655671 in words is "three million, six hundred fifty-five thousand, six hundred seventy-one".