1200042113 has 4 divisors (see below), whose sum is σ = 1206325248. Its totient is φ = 1193758980.

The previous prime is 1200042097. The next prime is 1200042119. The reversal of 1200042113 is 3112400021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3112400021 = 211 ⋅14750711.

It is a cyclic number.

It is not a de Polignac number, because 1200042113 - 2⁴ = 1200042097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200042119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3141281 + ... + 3141662.

It is an arithmetic number, because the mean of its divisors is an integer number (301581312).

Almost surely, 2^1200042113 is an apocalyptic number.

It is an amenable number.

1200042113 is a deficient number, since it is larger than the sum of its proper divisors (6283135).

1200042113 is an equidigital number, since it uses as much as digits as its factorization.

1200042113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6283134.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1200042113 is about 34641.6239948418. The cubic root of 1200042113 is about 1062.6710000762.

Adding to 1200042113 its reverse (3112400021), we get a palindrome (4312442134).

The spelling of 1200042113 in words is "one billion, two hundred million, forty-two thousand, one hundred thirteen".