1005111423 has 12 divisors (see below), whose sum is σ = 1505599368. Its totient is φ = 670074120.

The previous prime is 1005111407. The next prime is 1005111427. The reversal of 1005111423 is 3241115001.

1005111423 is a `hidden beast` number, since 10 + 0 + 511 + 142 + 3 = 666.

It is not a de Polignac number, because 1005111423 - 2⁴ = 1005111407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1005111396 and 1005111405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005111427) 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 11 ways as a sum of consecutive naturals, for example, 2067888 + ... + 2068373.

It is an arithmetic number, because the mean of its divisors is an integer number (125466614).

Almost surely, 2^1005111423 is an apocalyptic number.

1005111423 is a deficient number, since it is larger than the sum of its proper divisors (500487945).

1005111423 is an frugal number, since it uses more digits than its factorization.

1005111423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136276 (or 4136264 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1005111423 is about 31703.4922839740. The cubic root of 1005111423 is about 1001.7009129216.

Adding to 1005111423 its reverse (3241115001), we get a palindrome (4246226424).

The spelling of 1005111423 in words is "one billion, five million, one hundred eleven thousand, four hundred twenty-three".