1212435145 has 16 divisors (see below), whose sum is σ = 1479703680. Its totient is φ = 953564544.

The previous prime is 1212435139. The next prime is 1212435151. The reversal of 1212435145 is 5415342121.

It is an interprime number because it is at equal distance from previous prime (1212435139) and next prime (1212435151).

It is a cyclic number.

It is not a de Polignac number, because 1212435145 - 2³ = 1212435137 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63117 + ... + 80053.

It is an arithmetic number, because the mean of its divisors is an integer number (92481480).

Almost surely, 2^1212435145 is an apocalyptic number.

It is an amenable number.

1212435145 is a deficient number, since it is larger than the sum of its proper divisors (267268535).

1212435145 is a wasteful number, since it uses less digits than its factorization.

1212435145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17184.

The product of its digits is 4800, while the sum is 28.

The square root of 1212435145 is about 34820.0394169794. The cubic root of 1212435145 is about 1066.3166051263.

Adding to 1212435145 its reverse (5415342121), we get a palindrome (6627777266).

The spelling of 1212435145 in words is "one billion, two hundred twelve million, four hundred thirty-five thousand, one hundred forty-five".