1205070643 has 16 divisors (see below), whose sum is σ = 1399690240. Its totient is φ = 1016110656.

The previous prime is 1205070637. The next prime is 1205070667. The reversal of 1205070643 is 3460705021.

It is a cyclic number.

It is not a de Polignac number, because 1205070643 - 2¹³ = 1205062451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205070623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 486055 + ... + 488527.

It is an arithmetic number, because the mean of its divisors is an integer number (87480640).

Almost surely, 2^1205070643 is an apocalyptic number.

1205070643 is a deficient number, since it is larger than the sum of its proper divisors (194619597).

1205070643 is a wasteful number, since it uses less digits than its factorization.

1205070643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3586.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 1205070643 is about 34714.1274267408. The cubic root of 1205070643 is about 1064.1532331907.

Adding to 1205070643 its reverse (3460705021), we get a palindrome (4665775664).

The spelling of 1205070643 in words is "one billion, two hundred five million, seventy thousand, six hundred forty-three".