2578249 has 2 divisors, whose sum is σ = 2578250. Its totient is φ = 2578248.

The previous prime is 2578217. The next prime is 2578253. The reversal of 2578249 is 9428752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2295225 + 283024 = 1515^2 + 532^2 .

It is a cyclic number.

It is not a de Polignac number, because 2578249 - 2⁵ = 2578217 is a prime.

2578249 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2578259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1289124 + 1289125.

It is an arithmetic number, because the mean of its divisors is an integer number (1289125).

2^2578249 is an apocalyptic number.

It is an amenable number.

2578249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2578249 is an equidigital number, since it uses as much as digits as its factorization.

2578249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 2578249 is about 1605.6926854165. The cubic root of 2578249 is about 137.1223621304.

The spelling of 2578249 in words is "two million, five hundred seventy-eight thousand, two hundred forty-nine".