1147285 has 8 divisors (see below), whose sum is σ = 1383480. Its totient is φ = 913344.

The previous prime is 1147273. The next prime is 1147297. The reversal of 1147285 is 5827411.

It is an interprime number because it is at equal distance from previous prime (1147273) and next prime (1147297).

It can be written as a sum of positive squares in 4 ways, for example, as 51076 + 1096209 = 226^2 + 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 1147285 - 2⁵ = 1147253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 919 + ... + 1771.

It is an arithmetic number, because the mean of its divisors is an integer number (172935).

2^1147285 is an apocalyptic number.

It is an amenable number.

1147285 is a deficient number, since it is larger than the sum of its proper divisors (236195).

1147285 is an equidigital number, since it uses as much as digits as its factorization.

1147285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127.

The product of its digits is 2240, while the sum is 28.

The square root of 1147285 is about 1071.1139061743. The cubic root of 1147285 is about 104.6864417358.

The spelling of 1147285 in words is "one million, one hundred forty-seven thousand, two hundred eighty-five".