1005120397 has 8 divisors (see below), whose sum is σ = 1018672640. Its totient is φ = 991589040.

The previous prime is 1005120377. The next prime is 1005120469. The reversal of 1005120397 is 7930215001.

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

It is not a de Polignac number, because 1005120397 - 2⁷ = 1005120269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005120377) 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, 107947 + ... + 116887.

It is an arithmetic number, because the mean of its divisors is an integer number (127334080).

Almost surely, 2^1005120397 is an apocalyptic number.

It is an amenable number.

1005120397 is a deficient number, since it is larger than the sum of its proper divisors (13552243).

1005120397 is an equidigital number, since it uses as much as digits as its factorization.

1005120397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10443.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 1005120397 is about 31703.6338138075. The cubic root of 1005120397 is about 1001.7038940960.

Adding to 1005120397 its reverse (7930215001), we get a palindrome (8935335398).

The spelling of 1005120397 in words is "one billion, five million, one hundred twenty thousand, three hundred ninety-seven".