1142205 has 8 divisors (see below), whose sum is σ = 1827552. Its totient is φ = 609168.

The previous prime is 1142201. The next prime is 1142233. The reversal of 1142205 is 5022411.

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

It is not a de Polignac number, because 1142205 - 2² = 1142201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 76147 = 1142205 / (1 + 1 + 4 + 2 + 2 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38059 + ... + 38088.

It is an arithmetic number, because the mean of its divisors is an integer number (228444).

2^1142205 is an apocalyptic number.

1142205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1142205 is a deficient number, since it is larger than the sum of its proper divisors (685347).

1142205 is an equidigital number, since it uses as much as digits as its factorization.

1142205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76155.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1142205 is about 1068.7399122331. The cubic root of 1142205 is about 104.5317013471.

Adding to 1142205 its reverse (5022411), we get a palindrome (6164616).

The spelling of 1142205 in words is "one million, one hundred forty-two thousand, two hundred five".