1145431229 has 2 divisors, whose sum is σ = 1145431230. Its totient is φ = 1145431228.

The previous prime is 1145431223. The next prime is 1145431319. The reversal of 1145431229 is 9221345411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1128825604 + 16605625 = 33598^2 + 4075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1145431229 - 2⁴ = 1145431213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1145431195 and 1145431204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1145431223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572715614 + 572715615.

It is an arithmetic number, because the mean of its divisors is an integer number (572715615).

Almost surely, 2^1145431229 is an apocalyptic number.

It is an amenable number.

1145431229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1145431229 is an equidigital number, since it uses as much as digits as its factorization.

1145431229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 32.

The square root of 1145431229 is about 33844.2200235136. The cubic root of 1145431229 is about 1046.3002759102.

The spelling of 1145431229 in words is "one billion, one hundred forty-five million, four hundred thirty-one thousand, two hundred twenty-nine".