1143245 has 8 divisors (see below), whose sum is σ = 1377816. Its totient is φ = 910656.

The previous prime is 1143239. The next prime is 1143257. The reversal of 1143245 is 5423411.

It can be written as a sum of positive squares in 4 ways, for example, as 484 + 1142761 = 22^2 + 1069^2 .

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 1143245 - 2¹⁴ = 1126861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1559 + ... + 2171.

It is an arithmetic number, because the mean of its divisors is an integer number (172227).

2^1143245 is an apocalyptic number.

It is an amenable number.

1143245 is a deficient number, since it is larger than the sum of its proper divisors (234571).

1143245 is an equidigital number, since it uses as much as digits as its factorization.

1143245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991.

The product of its digits is 480, while the sum is 20.

The square root of 1143245 is about 1069.2263558293. The cubic root of 1143245 is about 104.5634177760.

Adding to 1143245 its reverse (5423411), we get a palindrome (6566656).

The spelling of 1143245 in words is "one million, one hundred forty-three thousand, two hundred forty-five".