1285044447 has 16 divisors (see below), whose sum is σ = 1761113952. Its totient is φ = 832872960.

The previous prime is 1285044403. The next prime is 1285044451. The reversal of 1285044447 is 7444405821.

It is not a de Polignac number, because 1285044447 - 2²² = 1280850143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285044487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160483 + ... + 168299.

It is an arithmetic number, because the mean of its divisors is an integer number (110069622).

Almost surely, 2^1285044447 is an apocalyptic number.

1285044447 is a deficient number, since it is larger than the sum of its proper divisors (476069505).

1285044447 is a wasteful number, since it uses less digits than its factorization.

1285044447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9338.

The product of its (nonzero) digits is 143360, while the sum is 39.

The square root of 1285044447 is about 35847.5166085463. The cubic root of 1285044447 is about 1087.1915036702.

The spelling of 1285044447 in words is "one billion, two hundred eighty-five million, forty-four thousand, four hundred forty-seven".