1245302020 has 96 divisors (see below), whose sum is σ = 2859585120. Its totient is φ = 453672960.

The previous prime is 1245302011. The next prime is 1245302039. The reversal of 1245302020 is 202035421.

It can be written as a sum of positive squares in 16 ways, for example, as 749883456 + 495418564 = 27384^2 + 22258^2 .

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 31 ways as a sum of consecutive naturals, for example, 2188296 + ... + 2188864.

It is an arithmetic number, because the mean of its divisors is an integer number (29787345).

Almost surely, 2^1245302020 is an apocalyptic number.

1245302020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245302020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1429792560).

1245302020 is an abundant number, since it is smaller than the sum of its proper divisors (1614283100).

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

1245302020 is a wasteful number, since it uses less digits than its factorization.

1245302020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 791 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 1245302020 is about 35288.8370451620. The cubic root of 1245302020 is about 1075.8661186456.

Adding to 1245302020 its reverse (202035421), we get a palindrome (1447337441).

The spelling of 1245302020 in words is "one billion, two hundred forty-five million, three hundred two thousand, twenty".