2551249 has 2 divisors, whose sum is σ = 2551250. Its totient is φ = 2551248.

The previous prime is 2551247. The next prime is 2551273. The reversal of 2551249 is 9421552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2433600 + 117649 = 1560^2 + 343^2 .

It is a cyclic number.

It is not a de Polignac number, because 2551249 - 2¹ = 2551247 is a prime.

Together with 2551247, it forms a pair of twin primes.

It is a Chen prime.

2551249 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2551247) 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, 1275624 + 1275625.

It is an arithmetic number, because the mean of its divisors is an integer number (1275625).

2^2551249 is an apocalyptic number.

It is an amenable number.

2551249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551249 is an equidigital number, since it uses as much as digits as its factorization.

2551249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 2551249 is about 1597.2629714609. The cubic root of 2551249 is about 136.6420227889.

The spelling of 2551249 in words is "two million, five hundred fifty-one thousand, two hundred forty-nine".