1263806 has 4 divisors (see below), whose sum is σ = 1895712. Its totient is φ = 631902.

The previous prime is 1263803. The next prime is 1263817. The reversal of 1263806 is 6083621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6083621 = 41 ⋅148381.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263803) 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 as a sum of consecutive naturals, namely, 315950 + ... + 315953.

It is an arithmetic number, because the mean of its divisors is an integer number (473928).

2^1263806 is an apocalyptic number.

1263806 is a deficient number, since it is larger than the sum of its proper divisors (631906).

1263806 is an equidigital number, since it uses as much as digits as its factorization.

1263806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631905.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1263806 is about 1124.1912648655. The cubic root of 1263806 is about 108.1168716533.

The spelling of 1263806 in words is "one million, two hundred sixty-three thousand, eight hundred six".