1243031030420 has 24 divisors (see below), whose sum is σ = 2700377757000. Its totient is φ = 480067156352.

The previous prime is 1243031030419. The next prime is 1243031030441. The reversal of 1243031030420 is 240301303421.

It can be written as a sum of positive squares in 4 ways, for example, as 315284496004 + 927746534416 = 561502^2 + 963196^2 .

It is a super-2 number, since 2×1243031030420² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1071577895 + ... + 1071579054.

It is an arithmetic number, because the mean of its divisors is an integer number (112515739875).

Almost surely, 2^{1243031030420} is an apocalyptic number.

1243031030420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243031030420 is an abundant number, since it is smaller than the sum of its proper divisors (1457346726580).

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

1243031030420 is a wasteful number, since it uses less digits than its factorization.

1243031030420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2143156987 (or 2143156985 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 1243031030420 its reverse (240301303421), we get a palindrome (1483332333841).

The spelling of 1243031030420 in words is "one trillion, two hundred forty-three billion, thirty-one million, thirty thousand, four hundred twenty".