1286713905 has 16 divisors (see below), whose sum is σ = 2129734080. Its totient is φ = 662583488.

The previous prime is 1286713889. The next prime is 1286713907. The reversal of 1286713905 is 5093176821.

It is a cyclic number.

It is not a de Polignac number, because 1286713905 - 2⁴ = 1286713889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1286713907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1478547 + ... + 1479416.

It is an arithmetic number, because the mean of its divisors is an integer number (133108380).

Almost surely, 2^1286713905 is an apocalyptic number.

1286713905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1286713905 is a deficient number, since it is larger than the sum of its proper divisors (843020175).

1286713905 is a wasteful number, since it uses less digits than its factorization.

1286713905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2958000.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 1286713905 is about 35870.7945967189. The cubic root of 1286713905 is about 1087.6621061030.

The spelling of 1286713905 in words is "one billion, two hundred eighty-six million, seven hundred thirteen thousand, nine hundred five".