1285796725 has 6 divisors (see below), whose sum is σ = 1594387970. Its totient is φ = 1028637360.

The previous prime is 1285796713. The next prime is 1285796737. The reversal of 1285796725 is 5276975821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1285796713) and next prime (1285796737).

It can be written as a sum of positive squares in 3 ways, for example, as 137874564 + 1147922161 = 11742^2 + 33881^2 .

It is not a de Polignac number, because 1285796725 - 2¹⁵ = 1285763957 is a prime.

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 5 ways as a sum of consecutive naturals, for example, 25715910 + ... + 25715959.

Almost surely, 2^1285796725 is an apocalyptic number.

It is an amenable number.

1285796725 is a deficient number, since it is larger than the sum of its proper divisors (308591245).

1285796725 is an equidigital number, since it uses as much as digits as its factorization.

1285796725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51431879 (or 51431874 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 52.

The square root of 1285796725 is about 35858.0078225213. The cubic root of 1285796725 is about 1087.4036132480.

The spelling of 1285796725 in words is "one billion, two hundred eighty-five million, seven hundred ninety-six thousand, seven hundred twenty-five".