1220659 has 4 divisors (see below), whose sum is σ = 1331640. Its totient is φ = 1109680.

The previous prime is 1220657. The next prime is 1220663. The reversal of 1220659 is 9560221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1220659 - 2¹ = 1220657 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1220657) 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, 55474 + ... + 55495.

It is an arithmetic number, because the mean of its divisors is an integer number (332910).

2^1220659 is an apocalyptic number.

1220659 is a deficient number, since it is larger than the sum of its proper divisors (110981).

1220659 is a wasteful number, since it uses less digits than its factorization.

1220659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110980.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1220659 is about 1104.8343767280. The cubic root of 1220659 is about 106.8722089259.

The spelling of 1220659 in words is "one million, two hundred twenty thousand, six hundred fifty-nine".