1243030420 has 24 divisors (see below), whose sum is σ = 2616410664. Its totient is φ = 496060416.

The previous prime is 1243030409. The next prime is 1243030421. The reversal of 1243030420 is 240303421.

It can be written as a sum of positive squares in 4 ways, for example, as 10458756 + 1232571664 = 3234^2 + 35108^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243030421) 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 7 ways as a sum of consecutive naturals, for example, 63109 + ... + 80428.

It is an arithmetic number, because the mean of its divisors is an integer number (109017111).

Almost surely, 2^1243030420 is an apocalyptic number.

1243030420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243030420 is an abundant number, since it is smaller than the sum of its proper divisors (1373380244).

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

1243030420 is a wasteful number, since it uses less digits than its factorization.

1243030420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143979 (or 143977 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1243030420 is about 35256.6365383881. The cubic root of 1243030420 is about 1075.2115451718.

Adding to 1243030420 its reverse (240303421), we get a palindrome (1483333841).

The spelling of 1243030420 in words is "one billion, two hundred forty-three million, thirty thousand, four hundred twenty".