4139249 has 2 divisors, whose sum is σ = 4139250. Its totient is φ = 4139248.

The previous prime is 4139221. The next prime is 4139273. The reversal of 4139249 is 9429314.

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., 2122849 + 2016400 = 1457^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 4139249 - 2⁸ = 4138993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4139209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069624 + 2069625.

It is an arithmetic number, because the mean of its divisors is an integer number (2069625).

Almost surely, 2^4139249 is an apocalyptic number.

It is an amenable number.

4139249 is a deficient number, since it is larger than the sum of its proper divisors (1).

4139249 is an equidigital number, since it uses as much as digits as its factorization.

4139249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 4139249 is about 2034.5144383857. The cubic root of 4139249 is about 160.5611675385.

The spelling of 4139249 in words is "four million, one hundred thirty-nine thousand, two hundred forty-nine".