3188261 has 2 divisors, whose sum is σ = 3188262. Its totient is φ = 3188260.

The previous prime is 3188249. The next prime is 3188291. The reversal of 3188261 is 1628813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3150625 + 37636 = 1775^2 + 194^2 .

It is a cyclic number.

It is not a de Polignac number, because 3188261 - 2¹⁸ = 2926117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3188221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1594130 + 1594131.

It is an arithmetic number, because the mean of its divisors is an integer number (1594131).

Almost surely, 2^3188261 is an apocalyptic number.

It is an amenable number.

3188261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3188261 is an equidigital number, since it uses as much as digits as its factorization.

3188261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 3188261 is about 1785.5702170455. The cubic root of 3188261 is about 147.1808439598.

The spelling of 3188261 in words is "three million, one hundred eighty-eight thousand, two hundred sixty-one".