1285281105 has 8 divisors (see below), whose sum is σ = 2056449792. Its totient is φ = 685483248.

The previous prime is 1285281103. The next prime is 1285281113. The reversal of 1285281105 is 5011825821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1285281105 - 2¹ = 1285281103 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285281103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42842689 + ... + 42842718.

It is an arithmetic number, because the mean of its divisors is an integer number (257056224).

Almost surely, 2^1285281105 is an apocalyptic number.

1285281105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1285281105 is a deficient number, since it is larger than the sum of its proper divisors (771168687).

1285281105 is an equidigital number, since it uses as much as digits as its factorization.

1285281105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85685415.

The product of its (nonzero) digits is 6400, while the sum is 33.

The square root of 1285281105 is about 35850.8173546992. The cubic root of 1285281105 is about 1087.2582398246.

The spelling of 1285281105 in words is "one billion, two hundred eighty-five million, two hundred eighty-one thousand, one hundred five".