1267643 has 4 divisors (see below), whose sum is σ = 1365168. Its totient is φ = 1170120.

The previous prime is 1267633. The next prime is 1267649. The reversal of 1267643 is 3467621.

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 1267643 - 2⁶ = 1267579 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1267649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48743 + ... + 48768.

It is an arithmetic number, because the mean of its divisors is an integer number (341292).

2^1267643 is an apocalyptic number.

1267643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1267643 is a deficient number, since it is larger than the sum of its proper divisors (97525).

1267643 is an equidigital number, since it uses as much as digits as its factorization.

1267643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97524.

The product of its digits is 6048, while the sum is 29.

The square root of 1267643 is about 1125.8965316582. The cubic root of 1267643 is about 108.2261778051.

The spelling of 1267643 in words is "one million, two hundred sixty-seven thousand, six hundred forty-three".