1220144 has 10 divisors (see below), whose sum is σ = 2364060. Its totient is φ = 610064.

The previous prime is 1220099. The next prime is 1220147. The reversal of 1220144 is 4410221.

It is not an unprimeable number, because it can be changed into a prime (1220147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38114 + ... + 38145.

It is an arithmetic number, because the mean of its divisors is an integer number (236406).

2^1220144 is an apocalyptic number.

It is an amenable number.

1220144 is a deficient number, since it is larger than the sum of its proper divisors (1143916).

1220144 is an equidigital number, since it uses as much as digits as its factorization.

1220144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76267 (or 76261 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1220144 is about 1104.6012855325. The cubic root of 1220144 is about 106.8571769009.

Adding to 1220144 its reverse (4410221), we get a palindrome (5630365).

The spelling of 1220144 in words is "one million, two hundred twenty thousand, one hundred forty-four".