3661249 has 2 divisors, whose sum is σ = 3661250. Its totient is φ = 3661248.

The previous prime is 3661247. The next prime is 3661271. The reversal of 3661249 is 9421663.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2537649 + 1123600 = 1593^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661249 - 2¹ = 3661247 is a prime.

Together with 3661247, it forms a pair of twin primes.

It is equal to p₂₆₀₇₈₈ and since 3661249 and 260788 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3661249.

It is not a weakly prime, because it can be changed into another prime (3661247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1830624 + 1830625.

It is an arithmetic number, because the mean of its divisors is an integer number (1830625).

Almost surely, 2^3661249 is an apocalyptic number.

It is an amenable number.

3661249 is a deficient number, since it is larger than the sum of its proper divisors (1).

3661249 is an equidigital number, since it uses as much as digits as its factorization.

3661249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 3661249 is about 1913.4390505057. The cubic root of 3661249 is about 154.1261826334.

The spelling of 3661249 in words is "three million, six hundred sixty-one thousand, two hundred forty-nine".