1205264311 has 2 divisors, whose sum is σ = 1205264312. Its totient is φ = 1205264310.

The previous prime is 1205264309. The next prime is 1205264353. The reversal of 1205264311 is 1134625021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1205264311 - 2¹ = 1205264309 is a prime.

Together with 1205264309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205267311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602632155 + 602632156.

It is an arithmetic number, because the mean of its divisors is an integer number (602632156).

Almost surely, 2^1205264311 is an apocalyptic number.

1205264311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205264311 is an equidigital number, since it uses as much as digits as its factorization.

1205264311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1205264311 is about 34716.9167841846. The cubic root of 1205264311 is about 1064.2102371487.

Adding to 1205264311 its reverse (1134625021), we get a palindrome (2339889332).

The spelling of 1205264311 in words is "one billion, two hundred five million, two hundred sixty-four thousand, three hundred eleven".