1220506 has 8 divisors (see below), whose sum is σ = 2092320. Its totient is φ = 523068.

The previous prime is 1220497. The next prime is 1220507. The reversal of 1220506 is 6050221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1220506.

It is not an unprimeable number, because it can be changed into a prime (1220507) 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, 43576 + ... + 43603.

It is an arithmetic number, because the mean of its divisors is an integer number (261540).

2^1220506 is an apocalyptic number.

1220506 is a deficient number, since it is larger than the sum of its proper divisors (871814).

1220506 is an equidigital number, since it uses as much as digits as its factorization.

1220506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87188.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 1220506 is about 1104.7651334107. The cubic root of 1220506 is about 106.8677435425.

Adding to 1220506 its reverse (6050221), we get a palindrome (7270727).

The spelling of 1220506 in words is "one million, two hundred twenty thousand, five hundred six".