1147231 has 2 divisors, whose sum is σ = 1147232. Its totient is φ = 1147230.

The previous prime is 1147229. The next prime is 1147243. The reversal of 1147231 is 1327411.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1147231 - 2¹ = 1147229 is a prime.

It is a super-2 number, since 2×1147231² = 2632277934722, which contains 22 as substring.

Together with 1147229, it forms a pair of twin primes.

1147231 is a lucky number.

It is equal to p₈₉₁₁₀ and since 1147231 and 89110 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 1147199 and 1147208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1147271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573615 + 573616.

It is an arithmetic number, because the mean of its divisors is an integer number (573616).

2^1147231 is an apocalyptic number.

1147231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147231 is an equidigital number, since it uses as much as digits as its factorization.

1147231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 168, while the sum is 19.

The square root of 1147231 is about 1071.0886984746. The cubic root of 1147231 is about 104.6847992620.

It can be divided in two parts, 1147 and 231, that added together give a triangular number (1378 = T₅₂).

The spelling of 1147231 in words is "one million, one hundred forty-seven thousand, two hundred thirty-one".