1286507 has 4 divisors (see below), whose sum is σ = 1288896. Its totient is φ = 1284120.

The previous prime is 1286503. The next prime is 1286513. The reversal of 1286507 is 7056821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1286507 - 2² = 1286503 is a prime.

It is a super-2 number, since 2×1286507² = 3310200522098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1286507.

It is not an unprimeable number, because it can be changed into a prime (1286503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38 + ... + 1604.

It is an arithmetic number, because the mean of its divisors is an integer number (322224).

2^1286507 is an apocalyptic number.

1286507 is a deficient number, since it is larger than the sum of its proper divisors (2389).

1286507 is an equidigital number, since it uses as much as digits as its factorization.

1286507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1286507 is about 1134.2429193079. The cubic root of 1286507 is about 108.7603803893.

The spelling of 1286507 in words is "one million, two hundred eighty-six thousand, five hundred seven".