1220144042 has 16 divisors (see below), whose sum is σ = 2024273832. Its totient is φ = 547922880.

The previous prime is 1220144041. The next prime is 1220144059. The reversal of 1220144042 is 2404410221.

It can be written as a sum of positive squares in 4 ways, for example, as 966028561 + 254115481 = 31081^2 + 15941^2 .

It is not an unprimeable number, because it can be changed into a prime (1220144041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633209 + ... + 635132.

Almost surely, 2^1220144042 is an apocalyptic number.

1220144042 is a deficient number, since it is larger than the sum of its proper divisors (804129790).

1220144042 is a wasteful number, since it uses less digits than its factorization.

1220144042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268393.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1220144042 is about 34930.5602875190. The cubic root of 1220144042 is about 1068.5717812698.

Adding to 1220144042 its reverse (2404410221), we get a palindrome (3624554263).

The spelling of 1220144042 in words is "one billion, two hundred twenty million, one hundred forty-four thousand, forty-two".