3561671 has 2 divisors, whose sum is σ = 3561672. Its totient is φ = 3561670.

The previous prime is 3561661. The next prime is 3561673. The reversal of 3561671 is 1761653.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3561671 - 2¹⁰ = 3560647 is a prime.

It is a Sophie Germain prime.

Together with 3561673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3561673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1780835 + 1780836.

It is an arithmetic number, because the mean of its divisors is an integer number (1780836).

Almost surely, 2^3561671 is an apocalyptic number.

3561671 is a deficient number, since it is larger than the sum of its proper divisors (1).

3561671 is an equidigital number, since it uses as much as digits as its factorization.

3561671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 29.

The square root of 3561671 is about 1887.2389885756. The cubic root of 3561671 is about 152.7160210072.

The spelling of 3561671 in words is "three million, five hundred sixty-one thousand, six hundred seventy-one".