4549861 has 2 divisors, whose sum is σ = 4549862. Its totient is φ = 4549860.

The previous prime is 4549859. The next prime is 4549933. The reversal of 4549861 is 1689454.

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., 3261636 + 1288225 = 1806^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 4549861 - 2¹ = 4549859 is a prime.

Together with 4549859, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 4549861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4549801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2274930 + 2274931.

It is an arithmetic number, because the mean of its divisors is an integer number (2274931).

Almost surely, 2^4549861 is an apocalyptic number.

It is an amenable number.

4549861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4549861 is an equidigital number, since it uses as much as digits as its factorization.

4549861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 4549861 is about 2133.0403184188. The cubic root of 4549861 is about 165.7038922124.

The spelling of 4549861 in words is "four million, five hundred forty-nine thousand, eight hundred sixty-one".