1142105 has 4 divisors (see below), whose sum is σ = 1370532. Its totient is φ = 913680.

The previous prime is 1142083. The next prime is 1142129. The reversal of 1142105 is 5012411.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 546121 + 595984 = 739^2 + 772^2 .

It is not a de Polignac number, because 1142105 - 2⁶ = 1142041 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1142105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114206 + ... + 114215.

It is an arithmetic number, because the mean of its divisors is an integer number (342633).

2^1142105 is an apocalyptic number.

It is an amenable number.

1142105 is a deficient number, since it is larger than the sum of its proper divisors (228427).

1142105 is an equidigital number, since it uses as much as digits as its factorization.

1142105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228426.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1142105 is about 1068.6931271417. The cubic root of 1142105 is about 104.5286506761.

Adding to 1142105 its reverse (5012411), we get a palindrome (6154516).

The spelling of 1142105 in words is "one million, one hundred forty-two thousand, one hundred five".