1212605045 has 4 divisors (see below), whose sum is σ = 1455126060. Its totient is φ = 970084032.

The previous prime is 1212605027. The next prime is 1212605059. The reversal of 1212605045 is 5405062121.

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 172607044 + 1039998001 = 13138^2 + 32249^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212605045 - 2¹⁴ = 1212588661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121260500 + ... + 121260509.

It is an arithmetic number, because the mean of its divisors is an integer number (363781515).

Almost surely, 2^1212605045 is an apocalyptic number.

It is an amenable number.

1212605045 is a deficient number, since it is larger than the sum of its proper divisors (242521015).

1212605045 is an equidigital number, since it uses as much as digits as its factorization.

1212605045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242521014.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1212605045 is about 34822.4790185880. The cubic root of 1212605045 is about 1066.3664108774.

Adding to 1212605045 its reverse (5405062121), we get a palindrome (6617667166).

The spelling of 1212605045 in words is "one billion, two hundred twelve million, six hundred five thousand, forty-five".