1220420132 has 12 divisors (see below), whose sum is σ = 2164992396. Its totient is φ = 601850880.

The previous prime is 1220420129. The next prime is 1220420161. The reversal of 1220420132 is 2310240221.

It can be written as a sum of positive squares in 2 ways, for example, as 990109156 + 230310976 = 31466^2 + 15176^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1220420132.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2089469 + ... + 2090052.

It is an arithmetic number, because the mean of its divisors is an integer number (180416033).

Almost surely, 2^1220420132 is an apocalyptic number.

It is an amenable number.

1220420132 is a deficient number, since it is larger than the sum of its proper divisors (944572264).

1220420132 is a wasteful number, since it uses less digits than its factorization.

1220420132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179598 (or 4179596 counting only the distinct ones).

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

The square root of 1220420132 is about 34934.5120475440. The cubic root of 1220420132 is about 1068.6523727747.

Adding to 1220420132 its reverse (2310240221), we get a palindrome (3530660353).

The spelling of 1220420132 in words is "one billion, two hundred twenty million, four hundred twenty thousand, one hundred thirty-two".