1220359 has 4 divisors (see below), whose sum is σ = 1394704. Its totient is φ = 1046016.

The previous prime is 1220353. The next prime is 1220363. The reversal of 1220359 is 9530221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220359 - 2⁵ = 1220327 is a prime.

It is an Ulam number.

It is a Duffinian number.

1220359 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87162 + ... + 87175.

It is an arithmetic number, because the mean of its divisors is an integer number (348676).

2^1220359 is an apocalyptic number.

1220359 is a deficient number, since it is larger than the sum of its proper divisors (174345).

1220359 is an equidigital number, since it uses as much as digits as its factorization.

1220359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174344.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1220359 is about 1104.6986014294. The cubic root of 1220359 is about 106.8634529207.

The spelling of 1220359 in words is "one million, two hundred twenty thousand, three hundred fifty-nine".