1025434987 has 2 divisors, whose sum is σ = 1025434988. Its totient is φ = 1025434986.

The previous prime is 1025434961. The next prime is 1025435083. The reversal of 1025434987 is 7894345201.

It is a weak prime.

It is an emirp because it is prime and its reverse (7894345201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1025434987 - 2⁷ = 1025434859 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025434087) 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, 512717493 + 512717494.

It is an arithmetic number, because the mean of its divisors is an integer number (512717494).

Almost surely, 2^1025434987 is an apocalyptic number.

1025434987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025434987 is an equidigital number, since it uses as much as digits as its factorization.

1025434987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 1025434987 is about 32022.4138221965. The cubic root of 1025434987 is about 1008.4074457619.

The spelling of 1025434987 in words is "one billion, twenty-five million, four hundred thirty-four thousand, nine hundred eighty-seven".