1285542456 has 32 divisors (see below), whose sum is σ = 3506025600. Its totient is φ = 389558240.

The previous prime is 1285542439. The next prime is 1285542497. The reversal of 1285542456 is 6542455821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2434476 + ... + 2435003.

It is an arithmetic number, because the mean of its divisors is an integer number (109563300).

Almost surely, 2^1285542456 is an apocalyptic number.

It is an amenable number.

1285542456 is an abundant number, since it is smaller than the sum of its proper divisors (2220483144).

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

1285542456 is a wasteful number, since it uses less digits than its factorization.

1285542456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869499 (or 4869495 counting only the distinct ones).

The product of its digits is 384000, while the sum is 42.

The square root of 1285542456 is about 35854.4621490826. The cubic root of 1285542456 is about 1087.3319297406.

The spelling of 1285542456 in words is "one billion, two hundred eighty-five million, five hundred forty-two thousand, four hundred fifty-six".