1286401 has 4 divisors (see below), whose sum is σ = 1294272. Its totient is φ = 1278532.

The previous prime is 1286399. The next prime is 1286419. The reversal of 1286401 is 1046821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1286401 - 2¹ = 1286399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1286491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3685 + ... + 4018.

It is an arithmetic number, because the mean of its divisors is an integer number (323568).

2^1286401 is an apocalyptic number.

It is an amenable number.

1286401 is a deficient number, since it is larger than the sum of its proper divisors (7871).

1286401 is an equidigital number, since it uses as much as digits as its factorization.

1286401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7870.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1286401 is about 1134.1961911416. The cubic root of 1286401 is about 108.7573932526.

The spelling of 1286401 in words is "one million, two hundred eighty-six thousand, four hundred one".