1220275 has 24 divisors (see below), whose sum is σ = 1825280. Its totient is φ = 790560.

The previous prime is 1220257. The next prime is 1220309. The reversal of 1220275 is 5720221.

It is not a de Polignac number, because 1220275 - 2⁷ = 1220147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3142 + ... + 3508.

2^1220275 is an apocalyptic number.

1220275 is a deficient number, since it is larger than the sum of its proper divisors (605005).

1220275 is a wasteful number, since it uses less digits than its factorization.

1220275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 1220275 is about 1104.6605813552. The cubic root of 1220275 is about 106.8610009821.

Adding to 1220275 its reverse (5720221), we get a palindrome (6940496).

The spelling of 1220275 in words is "one million, two hundred twenty thousand, two hundred seventy-five".