1005421005 has 96 divisors (see below), whose sum is σ = 1926288000. Its totient is φ = 501645312.

The previous prime is 1005420991. The next prime is 1005421013. The reversal of 1005421005 is 5001245001.

It is not a de Polignac number, because 1005421005 - 2¹⁷ = 1005289933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2239021 + ... + 2239469.

It is an arithmetic number, because the mean of its divisors is an integer number (20065500).

Almost surely, 2^1005421005 is an apocalyptic number.

1005421005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1005421005 is a deficient number, since it is larger than the sum of its proper divisors (920866995).

1005421005 is an equidigital number, since it uses as much as digits as its factorization.

1005421005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1005421005 is about 31708.3743670343. The cubic root of 1005421005 is about 1001.8037462101.

Adding to 1005421005 its reverse (5001245001), we get a palindrome (6006666006).

The spelling of 1005421005 in words is "one billion, five million, four hundred twenty-one thousand, five".