1285025796 has 42 divisors (see below), whose sum is σ = 3371657982. Its totient is φ = 428340960.

The previous prime is 1285025779. The next prime is 1285025839. The reversal of 1285025796 is 6975205821.

1285025796 is a `hidden beast` number, since 1 + 2 + 8 + 502 + 57 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1266363396 + 18662400 = 35586^2 + 4320^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 217425 + ... + 223256.

It is an arithmetic number, because the mean of its divisors is an integer number (80277571).

Almost surely, 2^1285025796 is an apocalyptic number.

It is an amenable number.

1285025796 is an abundant number, since it is smaller than the sum of its proper divisors (2086632186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285025796 is an equidigital number, since it uses as much as digits as its factorization.

1285025796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440703 (or 440686 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 1285025796 is about 35847.2564640587. The cubic root of 1285025796 is about 1087.1862438503.

It can be divided in two parts, 1285025 and 796, that added together give a palindrome (1285821).

The spelling of 1285025796 in words is "one billion, two hundred eighty-five million, twenty-five thousand, seven hundred ninety-six".