1263567 has 4 divisors (see below), whose sum is σ = 1684760. Its totient is φ = 842376.

The previous prime is 1263547. The next prime is 1263569. The reversal of 1263567 is 7653621.

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

It is not a de Polignac number, because 1263567 - 2⁶ = 1263503 is a prime.

It is a D-number.

It is a Duffinian number.

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 (1263569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210592 + ... + 210597.

It is an arithmetic number, because the mean of its divisors is an integer number (421190).

2^1263567 is an apocalyptic number.

1263567 is a deficient number, since it is larger than the sum of its proper divisors (421193).

1263567 is an equidigital number, since it uses as much as digits as its factorization.

1263567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421192.

The product of its digits is 7560, while the sum is 30.

The square root of 1263567 is about 1124.0849612018. The cubic root of 1263567 is about 108.1100558495.

It can be divided in two parts, 1263 and 567, that added together give a triangular number (1830 = T₆₀).

The spelling of 1263567 in words is "one million, two hundred sixty-three thousand, five hundred sixty-seven".