9961249 has 2 divisors, whose sum is σ = 9961250. Its totient is φ = 9961248.

The previous prime is 9961243. The next prime is 9961267. The reversal of 9961249 is 9421699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 4129024 = 2415^2 + 2032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9961249 is a prime.

It is not a weakly prime, because it can be changed into another prime (9961243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4980624 + 4980625.

It is an arithmetic number, because the mean of its divisors is an integer number (4980625).

Almost surely, 2^9961249 is an apocalyptic number.

It is an amenable number.

9961249 is a deficient number, since it is larger than the sum of its proper divisors (1).

9961249 is an equidigital number, since it uses as much as digits as its factorization.

9961249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 40.

The square root of 9961249 is about 3156.1446418059. The cubic root of 9961249 is about 215.1648204334.

The spelling of 9961249 in words is "nine million, nine hundred sixty-one thousand, two hundred forty-nine".