1212755245 has 16 divisors (see below), whose sum is σ = 1567993392. Its totient is φ = 895150080.

The previous prime is 1212755239. The next prime is 1212755249. The reversal of 1212755245 is 5425572121.

It can be written as a sum of positive squares in 8 ways, for example, as 106461124 + 1106294121 = 10318^2 + 33261^2 .

It is not a de Polignac number, because 1212755245 - 2¹¹ = 1212753197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212755245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212755249) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 227005 + ... + 232285.

It is an arithmetic number, because the mean of its divisors is an integer number (97999587).

Almost surely, 2^1212755245 is an apocalyptic number.

It is an amenable number.

1212755245 is a deficient number, since it is larger than the sum of its proper divisors (355238147).

1212755245 is a wasteful number, since it uses less digits than its factorization.

1212755245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8832.

The product of its digits is 28000, while the sum is 34.

The square root of 1212755245 is about 34824.6356046980. The cubic root of 1212755245 is about 1066.4104377497.

The spelling of 1212755245 in words is "one billion, two hundred twelve million, seven hundred fifty-five thousand, two hundred forty-five".