1005041021 has 8 divisors (see below), whose sum is σ = 1028859744. Its totient is φ = 981242640.

The previous prime is 1005040999. The next prime is 1005041041. The reversal of 1005041021 is 1201405001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1005041021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1005040987 and 1005041005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005041041) 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, 149666 + ... + 156236.

It is an arithmetic number, because the mean of its divisors is an integer number (128607468).

Almost surely, 2^1005041021 is an apocalyptic number.

It is an amenable number.

1005041021 is a deficient number, since it is larger than the sum of its proper divisors (23818723).

1005041021 is an equidigital number, since it uses as much as digits as its factorization.

1005041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10171.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1005041021 is about 31702.3819452104. The cubic root of 1005041021 is about 1001.6775246707.

Adding to 1005041021 its reverse (1201405001), we get a palindrome (2206446022).

The spelling of 1005041021 in words is "one billion, five million, forty-one thousand, twenty-one".