1200005042 has 24 divisors (see below), whose sum is σ = 1862307216. Its totient is φ = 579616128.

The previous prime is 1200005039. The next prime is 1200005047. The reversal of 1200005042 is 2405000021.

It is not an unprimeable number, because it can be changed into a prime (1200005047) 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 11 ways as a sum of consecutive naturals, for example, 808433 + ... + 809915.

It is an arithmetic number, because the mean of its divisors is an integer number (77596134).

Almost surely, 2^1200005042 is an apocalyptic number.

1200005042 is a deficient number, since it is larger than the sum of its proper divisors (662302174).

1200005042 is an equidigital number, since it uses as much as digits as its factorization.

1200005042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1200005042 is about 34641.0889263025. The cubic root of 1200005042 is about 1062.6600574929.

Adding to 1200005042 its reverse (2405000021), we get a palindrome (3605005063).

The spelling of 1200005042 in words is "one billion, two hundred million, five thousand, forty-two".