1285281102 has 64 divisors (see below), whose sum is σ = 3089088000. Its totient is φ = 348727680.

The previous prime is 1285281091. The next prime is 1285281103. The reversal of 1285281102 is 2011825821.

It is a super-2 number, since 2×1285281102² = 3303895022316668808, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1285281102.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65649 + ... + 82947.

It is an arithmetic number, because the mean of its divisors is an integer number (48267000).

Almost surely, 2^1285281102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285281102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544544000).

1285281102 is an abundant number, since it is smaller than the sum of its proper divisors (1803806898).

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

1285281102 is a wasteful number, since it uses less digits than its factorization.

1285281102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17401.

The product of its (nonzero) digits is 2560, while the sum is 30.

The square root of 1285281102 is about 35850.8173128591. The cubic root of 1285281102 is about 1087.2582389786.

The spelling of 1285281102 in words is "one billion, two hundred eighty-five million, two hundred eighty-one thousand, one hundred two".