1220267 has 4 divisors (see below), whose sum is σ = 1223376. Its totient is φ = 1217160.

The previous prime is 1220257. The next prime is 1220309. The reversal of 1220267 is 7620221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7620221 = 7 ⋅1088603.

It is a cyclic number.

It is not a de Polignac number, because 1220267 - 2⁴ = 1220251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220257) 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, 863 + ... + 1784.

It is an arithmetic number, because the mean of its divisors is an integer number (305844).

2^1220267 is an apocalyptic number.

1220267 is a deficient number, since it is larger than the sum of its proper divisors (3109).

1220267 is an equidigital number, since it uses as much as digits as its factorization.

1220267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3108.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 1220267 is about 1104.6569603275. The cubic root of 1220267 is about 106.8607674583.

Adding to 1220267 its reverse (7620221), we get a palindrome (8840488).

The spelling of 1220267 in words is "one million, two hundred twenty thousand, two hundred sixty-seven".