3149561 has 2 divisors, whose sum is σ = 3149562. Its totient is φ = 3149560.

The previous prime is 3149557. The next prime is 3149563. The reversal of 3149561 is 1659413.

3149561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2383936 + 765625 = 1544^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 3149561 - 2² = 3149557 is a prime.

Together with 3149563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3149563) 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, 1574780 + 1574781.

It is an arithmetic number, because the mean of its divisors is an integer number (1574781).

Almost surely, 2^3149561 is an apocalyptic number.

It is an amenable number.

3149561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3149561 is an equidigital number, since it uses as much as digits as its factorization.

3149561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 3149561 is about 1774.7002563813. The cubic root of 3149561 is about 146.5829107421.

The spelling of 3149561 in words is "three million, one hundred forty-nine thousand, five hundred sixty-one".