1220459 has 4 divisors (see below), whose sum is σ = 1228800. Its totient is φ = 1212120.

The previous prime is 1220437. The next prime is 1220489. The reversal of 1220459 is 9540221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9540221 = 373 ⋅25577.

It is a cyclic number.

It is not a de Polignac number, because 1220459 - 2⁸ = 1220203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220489) 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, 3947 + ... + 4244.

It is an arithmetic number, because the mean of its divisors is an integer number (307200).

2^1220459 is an apocalyptic number.

1220459 is a deficient number, since it is larger than the sum of its proper divisors (8341).

1220459 is an equidigital number, since it uses as much as digits as its factorization.

1220459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8340.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1220459 is about 1104.7438617164. The cubic root of 1220459 is about 106.8663717485.

The spelling of 1220459 in words is "one million, two hundred twenty thousand, four hundred fifty-nine".