2581349 has 2 divisors, whose sum is σ = 2581350. Its totient is φ = 2581348.

The previous prime is 2581289. The next prime is 2581357. The reversal of 2581349 is 9431852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1464100 + 1117249 = 1210^2 + 1057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2581349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2581049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1290674 + 1290675.

It is an arithmetic number, because the mean of its divisors is an integer number (1290675).

2^2581349 is an apocalyptic number.

It is an amenable number.

2581349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2581349 is an equidigital number, since it uses as much as digits as its factorization.

2581349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 32.

The square root of 2581349 is about 1606.6577109017. The cubic root of 2581349 is about 137.1772972264.

The spelling of 2581349 in words is "two million, five hundred eighty-one thousand, three hundred forty-nine".