1296911205 has 48 divisors (see below), whose sum is σ = 2302784640. Its totient is φ = 675024000.

The previous prime is 1296911191. The next prime is 1296911207. The reversal of 1296911205 is 5021196921.

It is not a de Polignac number, because 1296911205 - 2⁶ = 1296911141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1296911205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296911207) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 320686 + ... + 324704.

It is an arithmetic number, because the mean of its divisors is an integer number (47974680).

Almost surely, 2^1296911205 is an apocalyptic number.

1296911205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1296911205 is a deficient number, since it is larger than the sum of its proper divisors (1005873435).

1296911205 is a wasteful number, since it uses less digits than its factorization.

1296911205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202 (or 4199 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 1296911205 is about 36012.6534012699. The cubic root of 1296911205 is about 1090.5278158026.

The spelling of 1296911205 in words is "one billion, two hundred ninety-six million, nine hundred eleven thousand, two hundred five".