1220207 has 4 divisors (see below), whose sum is σ = 1222536. Its totient is φ = 1217880.

The previous prime is 1220203. The next prime is 1220239. The reversal of 1220207 is 7020221.

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 1220207 - 2² = 1220203 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220191 and 1220200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220203) 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, 32 + ... + 1562.

It is an arithmetic number, because the mean of its divisors is an integer number (305634).

2^1220207 is an apocalyptic number.

1220207 is a deficient number, since it is larger than the sum of its proper divisors (2329).

1220207 is an equidigital number, since it uses as much as digits as its factorization.

1220207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 1220207 is about 1104.6298022415. The cubic root of 1220207 is about 106.8590159970.

Adding to 1220207 its sum of digits (14), we get a palindrome (1220221).

Adding to 1220207 its reverse (7020221), we get a palindrome (8240428).

The spelling of 1220207 in words is "one million, two hundred twenty thousand, two hundred seven".