1004921881 has 4 divisors (see below), whose sum is σ = 1010730852. Its totient is φ = 999112912.

The previous prime is 1004921831. The next prime is 1004921921. The reversal of 1004921881 is 1881294001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 773729856 + 231192025 = 27816^2 + 15205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004921881 - 2¹¹ = 1004919833 is a prime.

It is a super-2 number, since 2×1004921881² = 2019735973825156322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1004921831) 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 3 ways as a sum of consecutive naturals, for example, 2904226 + ... + 2904571.

It is an arithmetic number, because the mean of its divisors is an integer number (252682713).

Almost surely, 2^1004921881 is an apocalyptic number.

It is an amenable number.

1004921881 is a deficient number, since it is larger than the sum of its proper divisors (5808971).

1004921881 is an equidigital number, since it uses as much as digits as its factorization.

1004921881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5808970.

The product of its (nonzero) digits is 4608, while the sum is 34.

The square root of 1004921881 is about 31700.5028509013. The cubic root of 1004921881 is about 1001.6379426790.

The spelling of 1004921881 in words is "one billion, four million, nine hundred twenty-one thousand, eight hundred eighty-one".