1285426756 has 6 divisors (see below), whose sum is σ = 2249496830. Its totient is φ = 642713376.

The previous prime is 1285426739. The next prime is 1285426757. The reversal of 1285426756 is 6576245821.

It can be written as a sum of positive squares in only one way, i.e., 874148356 + 411278400 = 29566^2 + 20280^2 .

It is not an unprimeable number, because it can be changed into a prime (1285426757) by changing a digit.

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 as a sum of consecutive naturals, namely, 160678341 + ... + 160678348.

Almost surely, 2^1285426756 is an apocalyptic number.

It is an amenable number.

1285426756 is a deficient number, since it is larger than the sum of its proper divisors (964070074).

1285426756 is a wasteful number, since it uses less digits than its factorization.

1285426756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321356693 (or 321356691 counting only the distinct ones).

The product of its digits is 806400, while the sum is 46.

The square root of 1285426756 is about 35852.8486455400. The cubic root of 1285426756 is about 1087.2993084717.

The spelling of 1285426756 in words is "one billion, two hundred eighty-five million, four hundred twenty-six thousand, seven hundred fifty-six".