1025145439 has 2 divisors, whose sum is σ = 1025145440. Its totient is φ = 1025145438.

The previous prime is 1025145377. The next prime is 1025145449. The reversal of 1025145439 is 9345415201.

It is a strong prime.

It is an emirp because it is prime and its reverse (9345415201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1025145439 - 2²⁷ = 890927711 is a prime.

It is a super-2 number, since 2×1025145439² = 2101846342205005442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025145449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512572719 + 512572720.

It is an arithmetic number, because the mean of its divisors is an integer number (512572720).

Almost surely, 2^1025145439 is an apocalyptic number.

1025145439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025145439 is an equidigital number, since it uses as much as digits as its factorization.

1025145439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1025145439 is about 32017.8924821732. The cubic root of 1025145439 is about 1008.3125234935.

The spelling of 1025145439 in words is "one billion, twenty-five million, one hundred forty-five thousand, four hundred thirty-nine".