1025625805 has 4 divisors (see below), whose sum is σ = 1230750972. Its totient is φ = 820500640.

The previous prime is 1025625781. The next prime is 1025625857. The reversal of 1025625805 is 5085265201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 555733476 + 469892329 = 23574^2 + 21677^2 .

It is not a de Polignac number, because 1025625805 - 2⁵ = 1025625773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 102562576 + ... + 102562585.

It is an arithmetic number, because the mean of its divisors is an integer number (307687743).

Almost surely, 2^1025625805 is an apocalyptic number.

It is an amenable number.

1025625805 is a deficient number, since it is larger than the sum of its proper divisors (205125167).

1025625805 is an equidigital number, since it uses as much as digits as its factorization.

1025625805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205125166.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 1025625805 is about 32025.3931279539. The cubic root of 1025625805 is about 1008.4699916928.

The spelling of 1025625805 in words is "one billion, twenty-five million, six hundred twenty-five thousand, eight hundred five".