1220666 has 8 divisors (see below), whose sum is σ = 1840800. Its totient is φ = 607068.

The previous prime is 1220663. The next prime is 1220669. The reversal of 1220666 is 6660221.

It is an interprime number because it is at equal distance from previous prime (1220663) and next prime (1220669).

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

It is not an unprimeable number, because it can be changed into a prime (1220663) 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, 1136 + ... + 1931.

It is an arithmetic number, because the mean of its divisors is an integer number (230100).

2^1220666 is an apocalyptic number.

1220666 is a deficient number, since it is larger than the sum of its proper divisors (620134).

1220666 is a wasteful number, since it uses less digits than its factorization.

1220666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3268.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1220666 is about 1104.8375446191. The cubic root of 1220666 is about 106.8724132156.

Adding to 1220666 its reverse (6660221), we get a palindrome (7880887).

The spelling of 1220666 in words is "one million, two hundred twenty thousand, six hundred sixty-six".