5249861 has 2 divisors, whose sum is σ = 5249862. Its totient is φ = 5249860.

The previous prime is 5249857. The next prime is 5249869. The reversal of 5249861 is 1689425.

5249861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5085025 + 164836 = 2255^2 + 406^2 .

It is a cyclic number.

It is not a de Polignac number, because 5249861 - 2² = 5249857 is a prime.

It is a super-2 number, since 2×5249861² = 55122081038642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5249869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2624930 + 2624931.

It is an arithmetic number, because the mean of its divisors is an integer number (2624931).

Almost surely, 2^5249861 is an apocalyptic number.

It is an amenable number.

5249861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5249861 is an equidigital number, since it uses as much as digits as its factorization.

5249861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 5249861 is about 2291.2575149904. The cubic root of 5249861 is about 173.7997983651.

The spelling of 5249861 in words is "five million, two hundred forty-nine thousand, eight hundred sixty-one".