1285857472 has 14 divisors (see below), whose sum is σ = 2551623548. Its totient is φ = 642928704.

The previous prime is 1285857439. The next prime is 1285857557. The reversal of 1285857472 is 2747585821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10045698 + ... + 10045825.

Almost surely, 2^1285857472 is an apocalyptic number.

It is an amenable number.

1285857472 is a deficient number, since it is larger than the sum of its proper divisors (1265766076).

1285857472 is an equidigital number, since it uses as much as digits as its factorization.

1285857472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20091535 (or 20091525 counting only the distinct ones).

The product of its digits is 1254400, while the sum is 49.

The square root of 1285857472 is about 35858.8548618051. The cubic root of 1285857472 is about 1087.4207376414.

The spelling of 1285857472 in words is "one billion, two hundred eighty-five million, eight hundred fifty-seven thousand, four hundred seventy-two".