1002142281 has 8 divisors (see below), whose sum is σ = 1527073984. Its totient is φ = 572652720.

The previous prime is 1002142277. The next prime is 1002142283. The reversal of 1002142281 is 1822412001.

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

It is not a de Polignac number, because 1002142281 - 2² = 1002142277 is a prime.

It is a super-2 number, since 2×1002142281² = 2008578302735765922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 47721061 = 1002142281 / (1 + 0 + 0 + 2 + 1 + 4 + 2 + 2 + 8 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1002142283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23860510 + ... + 23860551.

It is an arithmetic number, because the mean of its divisors is an integer number (190884248).

Almost surely, 2^1002142281 is an apocalyptic number.

It is an amenable number.

1002142281 is a deficient number, since it is larger than the sum of its proper divisors (524931703).

1002142281 is an equidigital number, since it uses as much as digits as its factorization.

1002142281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47721071.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 1002142281 is about 31656.6309167606. The cubic root of 1002142281 is about 1000.7135843429.

Adding to 1002142281 its reverse (1822412001), we get a palindrome (2824554282).

The spelling of 1002142281 in words is "one billion, two million, one hundred forty-two thousand, two hundred eighty-one".