1142305 has 4 divisors (see below), whose sum is σ = 1370772. Its totient is φ = 913840.

The previous prime is 1142287. The next prime is 1142311. The reversal of 1142305 is 5032411.

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 369664 + 772641 = 608^2 + 879^2 .

It is not a de Polignac number, because 1142305 - 2¹¹ = 1140257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114226 + ... + 114235.

It is an arithmetic number, because the mean of its divisors is an integer number (342693).

2^1142305 is an apocalyptic number.

It is an amenable number.

1142305 is a deficient number, since it is larger than the sum of its proper divisors (228467).

1142305 is an equidigital number, since it uses as much as digits as its factorization.

1142305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228466.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1142305 is about 1068.7866952765. The cubic root of 1142305 is about 104.5347518401.

Adding to 1142305 its reverse (5032411), we get a palindrome (6174716).

The spelling of 1142305 in words is "one million, one hundred forty-two thousand, three hundred five".