1228767 has 4 divisors (see below), whose sum is σ = 1638360. Its totient is φ = 819176.

The previous prime is 1228763. The next prime is 1228783. The reversal of 1228767 is 7678221.

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 1228767 - 2² = 1228763 is a prime.

It is an Ulam number.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228763) 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, 204792 + ... + 204797.

It is an arithmetic number, because the mean of its divisors is an integer number (409590).

2^1228767 is an apocalyptic number.

1228767 is a deficient number, since it is larger than the sum of its proper divisors (409593).

1228767 is an equidigital number, since it uses as much as digits as its factorization.

1228767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409592.

The product of its digits is 9408, while the sum is 33.

The square root of 1228767 is about 1108.4976319325. The cubic root of 1228767 is about 107.1083131813.

The spelling of 1228767 in words is "one million, two hundred twenty-eight thousand, seven hundred sixty-seven".