1220042 has 8 divisors (see below), whose sum is σ = 1837632. Its totient is φ = 607500.

The previous prime is 1220041. The next prime is 1220071. The reversal of 1220042 is 2400221.

1220042 is nontrivially palindromic in base 9.

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

It is not an unprimeable number, because it can be changed into a prime (1220041) 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, 584 + ... + 1667.

It is an arithmetic number, because the mean of its divisors is an integer number (229704).

2^1220042 is an apocalyptic number.

1220042 is a deficient number, since it is larger than the sum of its proper divisors (617590).

1220042 is a wasteful number, since it uses less digits than its factorization.

1220042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1220042 is about 1104.5551140618. Note that the first 3 decimals coincide. The cubic root of 1220042 is about 106.8541991825.

Adding to 1220042 its reverse (2400221), we get a palindrome (3620263).

The spelling of 1220042 in words is "one million, two hundred twenty thousand, forty-two".