3136561 has 2 divisors, whose sum is σ = 3136562. Its totient is φ = 3136560.

The previous prime is 3136543. The next prime is 3136571. The reversal of 3136561 is 1656313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2073600 + 1062961 = 1440^2 + 1031^2 .

It is an emirp because it is prime and its reverse (1656313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3136561 - 2⁷ = 3136433 is a prime.

It is not a weakly prime, because it can be changed into another prime (3136531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1568280 + 1568281.

It is an arithmetic number, because the mean of its divisors is an integer number (1568281).

Almost surely, 2^3136561 is an apocalyptic number.

It is an amenable number.

3136561 is a deficient number, since it is larger than the sum of its proper divisors (1).

3136561 is an equidigital number, since it uses as much as digits as its factorization.

3136561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1620, while the sum is 25.

The square root of 3136561 is about 1771.0338788403. The cubic root of 3136561 is about 146.3809560714.

The spelling of 3136561 in words is "three million, one hundred thirty-six thousand, five hundred sixty-one".