1220507 has 2 divisors, whose sum is σ = 1220508. Its totient is φ = 1220506.

The previous prime is 1220497. The next prime is 1220591. The reversal of 1220507 is 7050221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220507 - 2⁴ = 1220491 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1225507) 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 as a sum of consecutive naturals, namely, 610253 + 610254.

It is an arithmetic number, because the mean of its divisors is an integer number (610254).

2^1220507 is an apocalyptic number.

1220507 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220507 is an equidigital number, since it uses as much as digits as its factorization.

1220507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 1220507 is about 1104.7655859955. The cubic root of 1220507 is about 106.8677727292.

Adding to 1220507 its reverse (7050221), we get a palindrome (8270728).

The spelling of 1220507 in words is "one million, two hundred twenty thousand, five hundred seven".