1220023142 has 32 divisors (see below), whose sum is σ = 2043347040. Its totient is φ = 542695680.

The previous prime is 1220023141. The next prime is 1220023169. The reversal of 1220023142 is 2413200221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220023142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220023141) 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 15 ways as a sum of consecutive naturals, for example, 81584 + ... + 95372.

It is an arithmetic number, because the mean of its divisors is an integer number (63854595).

Almost surely, 2^1220023142 is an apocalyptic number.

1220023142 is a deficient number, since it is larger than the sum of its proper divisors (823323898).

1220023142 is a wasteful number, since it uses less digits than its factorization.

1220023142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13928.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1220023142 is about 34928.8296683413. The cubic root of 1220023142 is about 1068.5364863671.

Adding to 1220023142 its reverse (2413200221), we get a palindrome (3633223363).

The spelling of 1220023142 in words is "one billion, two hundred twenty million, twenty-three thousand, one hundred forty-two".