1147382221 has 4 divisors (see below), whose sum is σ = 1149087772. Its totient is φ = 1145676672.

The previous prime is 1147382183. The next prime is 1147382231. The reversal of 1147382221 is 1222837411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222837411 = 151 ⋅8098261.

It can be written as a sum of positive squares in 2 ways, for example, as 589761225 + 557620996 = 24285^2 + 23614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1147382221 - 2¹¹ = 1147380173 is a prime.

It is a super-2 number, since 2×1147382221² = 2632971922133785682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147382231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851766 + ... + 853111.

It is an arithmetic number, because the mean of its divisors is an integer number (287271943).

Almost surely, 2^1147382221 is an apocalyptic number.

It is an amenable number.

1147382221 is a deficient number, since it is larger than the sum of its proper divisors (1705551).

1147382221 is an equidigital number, since it uses as much as digits as its factorization.

1147382221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705550.

The product of its digits is 5376, while the sum is 31.

The square root of 1147382221 is about 33873.0308800379. The cubic root of 1147382221 is about 1046.8939869740.

The spelling of 1147382221 in words is "one billion, one hundred forty-seven million, three hundred eighty-two thousand, two hundred twenty-one".