1025443249 has 2 divisors, whose sum is σ = 1025443250. Its totient is φ = 1025443248.

The previous prime is 1025443193. The next prime is 1025443259. The reversal of 1025443249 is 9423445201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 952648225 + 72795024 = 30865^2 + 8532^2 .

It is an emirp because it is prime and its reverse (9423445201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025443249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025443259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512721624 + 512721625.

It is an arithmetic number, because the mean of its divisors is an integer number (512721625).

Almost surely, 2^1025443249 is an apocalyptic number.

It is an amenable number.

1025443249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025443249 is an equidigital number, since it uses as much as digits as its factorization.

1025443249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 1025443249 is about 32022.5428253285. The cubic root of 1025443249 is about 1008.4101540240.

The spelling of 1025443249 in words is "one billion, twenty-five million, four hundred forty-three thousand, two hundred forty-nine".