1212628513 has 4 divisors (see below), whose sum is σ = 1283959620. Its totient is φ = 1141297408.

The previous prime is 1212628493. The next prime is 1212628541. The reversal of 1212628513 is 3158262121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1096139664 + 116488849 = 33108^2 + 10793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212628513 - 2¹⁷ = 1212497441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212628213) 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 3 ways as a sum of consecutive naturals, for example, 35665528 + ... + 35665561.

It is an arithmetic number, because the mean of its divisors is an integer number (320989905).

Almost surely, 2^1212628513 is an apocalyptic number.

It is an amenable number.

1212628513 is a deficient number, since it is larger than the sum of its proper divisors (71331107).

1212628513 is an equidigital number, since it uses as much as digits as its factorization.

1212628513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71331106.

The product of its digits is 5760, while the sum is 31.

The square root of 1212628513 is about 34822.8159832027. The cubic root of 1212628513 is about 1066.3732900960.

The spelling of 1212628513 in words is "one billion, two hundred twelve million, six hundred twenty-eight thousand, five hundred thirteen".