1216967225 has 12 divisors (see below), whose sum is σ = 1515059280. Its totient is φ = 969690000.

The previous prime is 1216967201. The next prime is 1216967239. The reversal of 1216967225 is 5227696121.

It is not a de Polignac number, because 1216967225 - 2¹⁴ = 1216950841 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90695 + ... + 103244.

It is an arithmetic number, because the mean of its divisors is an integer number (126254940).

Almost surely, 2^1216967225 is an apocalyptic number.

It is an amenable number.

1216967225 is a deficient number, since it is larger than the sum of its proper divisors (298092055).

1216967225 is a wasteful number, since it uses less digits than its factorization.

1216967225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194200 (or 194195 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 1216967225 is about 34885.0573311841. The cubic root of 1216967225 is about 1067.6435828198.

The spelling of 1216967225 in words is "one billion, two hundred sixteen million, nine hundred sixty-seven thousand, two hundred twenty-five".