1025791887 has 8 divisors (see below), whose sum is σ = 1368180736. Its totient is φ = 683632152.

The previous prime is 1025791847. The next prime is 1025791913. The reversal of 1025791887 is 7881975201.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1025791887 - 2⁸ = 1025791631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025791847) 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 in 7 ways as a sum of consecutive naturals, for example, 46543 + ... + 64944.

It is an arithmetic number, because the mean of its divisors is an integer number (171022592).

Almost surely, 2^1025791887 is an apocalyptic number.

1025791887 is a deficient number, since it is larger than the sum of its proper divisors (342388849).

1025791887 is a wasteful number, since it uses less digits than its factorization.

1025791887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114557.

The product of its (nonzero) digits is 282240, while the sum is 48.

The square root of 1025791887 is about 32027.9859966249. The cubic root of 1025791887 is about 1008.5244233945.

The spelling of 1025791887 in words is "one billion, twenty-five million, seven hundred ninety-one thousand, eight hundred eighty-seven".