1285217552 has 20 divisors (see below), whose sum is σ = 2598375360. Its totient is φ = 614669088.

The previous prime is 1285217539. The next prime is 1285217581. The reversal of 1285217552 is 2557125821.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1745852 + ... + 1746587.

It is an arithmetic number, because the mean of its divisors is an integer number (129918768).

Almost surely, 2^1285217552 is an apocalyptic number.

It is an amenable number.

1285217552 is an abundant number, since it is smaller than the sum of its proper divisors (1313157808).

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

1285217552 is a wasteful number, since it uses less digits than its factorization.

1285217552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3492470 (or 3492464 counting only the distinct ones).

The product of its digits is 56000, while the sum is 38.

The square root of 1285217552 is about 35849.9309901707. The cubic root of 1285217552 is about 1087.2403190596.

The spelling of 1285217552 in words is "one billion, two hundred eighty-five million, two hundred seventeen thousand, five hundred fifty-two".