1220235 has 8 divisors (see below), whose sum is σ = 1952400. Its totient is φ = 650784.

The previous prime is 1220203. The next prime is 1220239. The reversal of 1220235 is 5320221.

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

It is not a de Polignac number, because 1220235 - 2⁵ = 1220203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 81349 = 1220235 / (1 + 2 + 2 + 0 + 2 + 3 + 5).

It is not an unprimeable number, because it can be changed into a prime (1220239) 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 7 ways as a sum of consecutive naturals, for example, 40660 + ... + 40689.

It is an arithmetic number, because the mean of its divisors is an integer number (244050).

2^1220235 is an apocalyptic number.

1220235 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1220235 is a deficient number, since it is larger than the sum of its proper divisors (732165).

1220235 is an equidigital number, since it uses as much as digits as its factorization.

1220235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81357.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1220235 is about 1104.6424760980. The cubic root of 1220235 is about 106.8598333527.

Adding to 1220235 its reverse (5320221), we get a palindrome (6540456).

The spelling of 1220235 in words is "one million, two hundred twenty thousand, two hundred thirty-five".