1142005 has 8 divisors (see below), whose sum is σ = 1407672. Its totient is φ = 888768.

The previous prime is 1142003. The next prime is 1142017. The reversal of 1142005 is 5002411.

It can be written as a sum of positive squares in 4 ways, for example, as 45796 + 1096209 = 214^2 + 1047^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1142005 - 2¹ = 1142003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2902 + ... + 3271.

It is an arithmetic number, because the mean of its divisors is an integer number (175959).

2^1142005 is an apocalyptic number.

It is an amenable number.

1142005 is a deficient number, since it is larger than the sum of its proper divisors (265667).

1142005 is an equidigital number, since it uses as much as digits as its factorization.

1142005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6215.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1142005 is about 1068.6463400022. The cubic root of 1142005 is about 104.5255998269.

Adding to 1142005 its reverse (5002411), we get a palindrome (6144416).

The spelling of 1142005 in words is "one million, one hundred forty-two thousand, five".