5615861 has 2 divisors, whose sum is σ = 5615862. Its totient is φ = 5615860.

The previous prime is 5615851. The next prime is 5615881. The reversal of 5615861 is 1685165.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3422500 + 2193361 = 1850^2 + 1481^2 .

It is a cyclic number.

It is not a de Polignac number, because 5615861 - 2¹⁸ = 5353717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5615851) 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, 2807930 + 2807931.

It is an arithmetic number, because the mean of its divisors is an integer number (2807931).

Almost surely, 2^5615861 is an apocalyptic number.

It is an amenable number.

5615861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5615861 is an equidigital number, since it uses as much as digits as its factorization.

5615861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 32.

The square root of 5615861 is about 2369.7807915501. The cubic root of 5615861 is about 177.7482976146.

The spelling of 5615861 in words is "five million, six hundred fifteen thousand, eight hundred sixty-one".