1220355142 has 32 divisors (see below), whose sum is σ = 1982373120. Its totient is φ = 561647520.

The previous prime is 1220355133. The next prime is 1220355151. The reversal of 1220355142 is 2415530221.

It is an interprime number because it is at equal distance from previous prime (1220355133) and next prime (1220355151).

It is a congruent number.

It is an unprimeable number.

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, 189223 + ... + 195565.

It is an arithmetic number, because the mean of its divisors is an integer number (61949160).

Almost surely, 2^1220355142 is an apocalyptic number.

1220355142 is a deficient number, since it is larger than the sum of its proper divisors (762017978).

1220355142 is a wasteful number, since it uses less digits than its factorization.

1220355142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6508.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1220355142 is about 34933.5818661643. The cubic root of 1220355142 is about 1068.6334030913.

Adding to 1220355142 its reverse (2415530221), we get a palindrome (3635885363).

The spelling of 1220355142 in words is "one billion, two hundred twenty million, three hundred fifty-five thousand, one hundred forty-two".