1143215449 has 2 divisors, whose sum is σ = 1143215450. Its totient is φ = 1143215448.

The previous prime is 1143215441. The next prime is 1143215471. The reversal of 1143215449 is 9445123411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1100116224 + 43099225 = 33168^2 + 6565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1143215449 - 2³ = 1143215441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1143215441) by changing a digit.

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 as a sum of consecutive naturals, namely, 571607724 + 571607725.

It is an arithmetic number, because the mean of its divisors is an integer number (571607725).

Almost surely, 2^1143215449 is an apocalyptic number.

It is an amenable number.

1143215449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1143215449 is an equidigital number, since it uses as much as digits as its factorization.

1143215449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 1143215449 is about 33811.4691931599. The cubic root of 1143215449 is about 1045.6251683757.

The spelling of 1143215449 in words is "one billion, one hundred forty-three million, two hundred fifteen thousand, four hundred forty-nine".