1214785305 has 12 divisors (see below), whose sum is σ = 2105627940. Its totient is φ = 647885472.

The previous prime is 1214785289. The next prime is 1214785309. The reversal of 1214785305 is 5035874121.

It can be written as a sum of positive squares in 2 ways, for example, as 282643344 + 932141961 = 16812^2 + 30531^2 .

It is not a de Polignac number, because 1214785305 - 2⁴ = 1214785289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1214785305.

It is not an unprimeable number, because it can be changed into a prime (1214785309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13497570 + ... + 13497659.

It is an arithmetic number, because the mean of its divisors is an integer number (175468995).

Almost surely, 2^1214785305 is an apocalyptic number.

1214785305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1214785305 is a deficient number, since it is larger than the sum of its proper divisors (890842635).

1214785305 is a wasteful number, since it uses less digits than its factorization.

1214785305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26995240 (or 26995237 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 1214785305 is about 34853.7703125501. The cubic root of 1214785305 is about 1067.0051360226.

The spelling of 1214785305 in words is "one billion, two hundred fourteen million, seven hundred eighty-five thousand, three hundred five".