1229215841 has 16 divisors (see below), whose sum is σ = 1466982144. Its totient is φ = 1007058624.

The previous prime is 1229215831. The next prime is 1229215847. The reversal of 1229215841 is 1485129221.

It is a cyclic number.

It is not a de Polignac number, because 1229215841 - 2⁶ = 1229215777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1229215847) 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 in 15 ways as a sum of consecutive naturals, for example, 358451 + ... + 361863.

It is an arithmetic number, because the mean of its divisors is an integer number (91686384).

Almost surely, 2^1229215841 is an apocalyptic number.

It is an amenable number.

1229215841 is a deficient number, since it is larger than the sum of its proper divisors (237766303).

1229215841 is a wasteful number, since it uses less digits than its factorization.

1229215841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5680.

The product of its digits is 11520, while the sum is 35.

The square root of 1229215841 is about 35060.1745717274. The cubic root of 1229215841 is about 1071.2135301450.

The spelling of 1229215841 in words is "one billion, two hundred twenty-nine million, two hundred fifteen thousand, eight hundred forty-one".