1021812146 has 8 divisors (see below), whose sum is σ = 1532854044. Its totient is φ = 510860800.

The previous prime is 1021812137. The next prime is 1021812157. The reversal of 1021812146 is 6412181201.

It can be written as a sum of positive squares in 2 ways, for example, as 890365921 + 131446225 = 29839^2 + 11465^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 30866 + ... + 54738.

Almost surely, 2^1021812146 is an apocalyptic number.

1021812146 is a deficient number, since it is larger than the sum of its proper divisors (511041898).

1021812146 is a wasteful number, since it uses less digits than its factorization.

1021812146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45276.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 1021812146 is about 31965.7965018862. The cubic root of 1021812146 is about 1007.2184834533.

Adding to 1021812146 its reverse (6412181201), we get a palindrome (7433993347).

The spelling of 1021812146 in words is "one billion, twenty-one million, eight hundred twelve thousand, one hundred forty-six".