1286913 has 8 divisors (see below), whose sum is σ = 1728000. Its totient is φ = 851888.

The previous prime is 1286881. The next prime is 1286939. The reversal of 1286913 is 3196821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1286913 - 2⁵ = 1286881 is a prime.

It is a super-2 number, since 2×1286913² = 3312290139138, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1286953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993 + ... + 1886.

It is an arithmetic number, because the mean of its divisors is an integer number (216000).

2^1286913 is an apocalyptic number.

It is an amenable number.

1286913 is a deficient number, since it is larger than the sum of its proper divisors (441087).

1286913 is a wasteful number, since it uses less digits than its factorization.

1286913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031.

The product of its digits is 2592, while the sum is 30.

The square root of 1286913 is about 1134.4218791966. The cubic root of 1286913 is about 108.7718201691.

The spelling of 1286913 in words is "one million, two hundred eighty-six thousand, nine hundred thirteen".