1285725896 has 160 divisors (see below), whose sum is σ = 3199862400. Its totient is φ = 480090240.

The previous prime is 1285725871. The next prime is 1285725923. The reversal of 1285725896 is 6985275821.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4744241 + ... + 4744511.

It is an arithmetic number, because the mean of its divisors is an integer number (19999140).

Almost surely, 2^1285725896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285725896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1599931200).

1285725896 is an abundant number, since it is smaller than the sum of its proper divisors (1914136504).

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

1285725896 is a wasteful number, since it uses less digits than its factorization.

1285725896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 312 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 53.

The square root of 1285725896 is about 35857.0201773655. The cubic root of 1285725896 is about 1087.3836460885.

The spelling of 1285725896 in words is "one billion, two hundred eighty-five million, seven hundred twenty-five thousand, eight hundred ninety-six".