1205143207 has 2 divisors, whose sum is σ = 1205143208. Its totient is φ = 1205143206.

The previous prime is 1205143201. The next prime is 1205143237. The reversal of 1205143207 is 7023415021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1205143207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205143201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602571603 + 602571604.

It is an arithmetic number, because the mean of its divisors is an integer number (602571604).

Almost surely, 2^1205143207 is an apocalyptic number.

1205143207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205143207 is an equidigital number, since it uses as much as digits as its factorization.

1205143207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 1205143207 is about 34715.1725762670. The cubic root of 1205143207 is about 1064.1745922886.

Adding to 1205143207 its reverse (7023415021), we get a palindrome (8228558228).

The spelling of 1205143207 in words is "one billion, two hundred five million, one hundred forty-three thousand, two hundred seven".