1220331 has 8 divisors (see below), whose sum is σ = 1859584. Its totient is φ = 697320.

The previous prime is 1220327. The next prime is 1220333. The reversal of 1220331 is 1330221.

It is a happy number.

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

It is not a de Polignac number, because 1220331 - 2² = 1220327 is a prime.

It is a super-2 number, since 2×1220331² = 2978415499122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220333) 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 7 ways as a sum of consecutive naturals, for example, 29035 + ... + 29076.

It is an arithmetic number, because the mean of its divisors is an integer number (232448).

2^1220331 is an apocalyptic number.

1220331 is a deficient number, since it is larger than the sum of its proper divisors (639253).

1220331 is an equidigital number, since it uses as much as digits as its factorization.

1220331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58121.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1220331 is about 1104.6859282167. The cubic root of 1220331 is about 106.8626356203.

Adding to 1220331 its reverse (1330221), we get a palindrome (2550552).

It can be divided in two parts, 1220 and 331, that added together give a palindrome (1551).

The spelling of 1220331 in words is "one million, two hundred twenty thousand, three hundred thirty-one".