1285542555 has 32 divisors (see below), whose sum is σ = 2246807808. Its totient is φ = 622473600.

The previous prime is 1285542551. The next prime is 1285542571. The reversal of 1285542555 is 5552455821.

It is not a de Polignac number, because 1285542555 - 2² = 1285542551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285542551) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131745 + ... + 141165.

It is an arithmetic number, because the mean of its divisors is an integer number (70212744).

Almost surely, 2^1285542555 is an apocalyptic number.

1285542555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1285542555 is a deficient number, since it is larger than the sum of its proper divisors (961265253).

1285542555 is a wasteful number, since it uses less digits than its factorization.

1285542555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267.

The product of its digits is 400000, while the sum is 42.

The square root of 1285542555 is about 35854.4635296639. The cubic root of 1285542555 is about 1087.3319576525.

The spelling of 1285542555 in words is "one billion, two hundred eighty-five million, five hundred forty-two thousand, five hundred fifty-five".