1286361 has 10 divisors (see below), whose sum is σ = 1921722. Its totient is φ = 857520.

The previous prime is 1286359. The next prime is 1286371. The reversal of 1286361 is 1636821.

1286361 is a `hidden beast` number, since 1 + 28 + 636 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1265625 + 20736 = 1125^2 + 144^2 .

It is not a de Polignac number, because 1286361 - 2¹ = 1286359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1286371) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7860 + ... + 8021.

2^1286361 is an apocalyptic number.

It is an amenable number.

1286361 is a deficient number, since it is larger than the sum of its proper divisors (635361).

1286361 is an equidigital number, since it uses as much as digits as its factorization.

1286361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15893 (or 15884 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1286361 is about 1134.1785573709. The cubic root of 1286361 is about 108.7562659885.

The spelling of 1286361 in words is "one million, two hundred eighty-six thousand, three hundred sixty-one".