1025145449 has 2 divisors, whose sum is σ = 1025145450. Its totient is φ = 1025145448.

The previous prime is 1025145439. The next prime is 1025145461. The reversal of 1025145449 is 9445415201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869070400 + 156075049 = 29480^2 + 12493^2 .

It is an emirp because it is prime and its reverse (9445415201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1025145449 - 2¹² = 1025141353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025145439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512572724 + 512572725.

It is an arithmetic number, because the mean of its divisors is an integer number (512572725).

Almost surely, 2^1025145449 is an apocalyptic number.

It is an amenable number.

1025145449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025145449 is an equidigital number, since it uses as much as digits as its factorization.

1025145449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 1025145449 is about 32017.8926383358. The cubic root of 1025145449 is about 1008.3125267721.

The spelling of 1025145449 in words is "one billion, twenty-five million, one hundred forty-five thousand, four hundred forty-nine".