4991249 has 2 divisors, whose sum is σ = 4991250. Its totient is φ = 4991248.

The previous prime is 4991237. The next prime is 4991257. The reversal of 4991249 is 9421994.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3534400 + 1456849 = 1880^2 + 1207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4991249 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4991449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2495624 + 2495625.

It is an arithmetic number, because the mean of its divisors is an integer number (2495625).

Almost surely, 2^4991249 is an apocalyptic number.

It is an amenable number.

4991249 is a deficient number, since it is larger than the sum of its proper divisors (1).

4991249 is an equidigital number, since it uses as much as digits as its factorization.

4991249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 4991249 is about 2234.1103374722. The cubic root of 4991249 is about 170.8977764143.

The spelling of 4991249 in words is "four million, nine hundred ninety-one thousand, two hundred forty-nine".