1229540449 has 2 divisors, whose sum is σ = 1229540450. Its totient is φ = 1229540448.

The previous prime is 1229540443. The next prime is 1229540489. The reversal of 1229540449 is 9440459221.

It is an a-pointer prime, because the next prime (1229540489) can be obtained adding 1229540449 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 671069025 + 558471424 = 25905^2 + 23632^2 .

It is a cyclic number.

It is not a de Polignac number, because 1229540449 - 2⁹ = 1229539937 is a prime.

It is not a weakly prime, because it can be changed into another prime (1229540443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 614770224 + 614770225.

It is an arithmetic number, because the mean of its divisors is an integer number (614770225).

Almost surely, 2^1229540449 is an apocalyptic number.

It is an amenable number.

1229540449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1229540449 is an equidigital number, since it uses as much as digits as its factorization.

1229540449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 1229540449 is about 35064.8035642580. The cubic root of 1229540449 is about 1071.3078162380.

The spelling of 1229540449 in words is "one billion, two hundred twenty-nine million, five hundred forty thousand, four hundred forty-nine".