3128249 has 2 divisors, whose sum is σ = 3128250. Its totient is φ = 3128248.

The previous prime is 3128233. The next prime is 3128291. The reversal of 3128249 is 9428213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2805625 + 322624 = 1675^2 + 568^2 .

It is an emirp because it is prime and its reverse (9428213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3128249 - 2⁴ = 3128233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3128849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1564124 + 1564125.

It is an arithmetic number, because the mean of its divisors is an integer number (1564125).

Almost surely, 2^3128249 is an apocalyptic number.

It is an amenable number.

3128249 is a deficient number, since it is larger than the sum of its proper divisors (1).

3128249 is an equidigital number, since it uses as much as digits as its factorization.

3128249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 3128249 is about 1768.6856702082. The cubic root of 3128249 is about 146.2515367409.

The spelling of 3128249 in words is "three million, one hundred twenty-eight thousand, two hundred forty-nine".