1220725602 has 24 divisors (see below), whose sum is σ = 2674627020. Its totient is φ = 402336000.

The previous prime is 1220725591. The next prime is 1220725609. The reversal of 1220725602 is 2065270221.

1220725602 is a `hidden beast` number, since 12 + 20 + 7 + 25 + 602 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1220035041 + 690561 = 34929^2 + 831^2 .

It is not an unprimeable number, because it can be changed into a prime (1220725609) 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 11 ways as a sum of consecutive naturals, for example, 379399 + ... + 382602.

Almost surely, 2^1220725602 is an apocalyptic number.

1220725602 is an abundant number, since it is smaller than the sum of its proper divisors (1453901418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220725602 is a wasteful number, since it uses less digits than its factorization.

1220725602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762098 (or 762095 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1220725602 is about 34938.8838115931. The cubic root of 1220725602 is about 1068.7415262281.

Adding to 1220725602 its reverse (2065270221), we get a palindrome (3285995823).

The spelling of 1220725602 in words is "one billion, two hundred twenty million, seven hundred twenty-five thousand, six hundred two".