1243130434 has 32 divisors (see below), whose sum is σ = 2298119040. Its totient is φ = 491121792.

The previous prime is 1243130429. The next prime is 1243130453. The reversal of 1243130434 is 4340313421.

It is a junction number, because it is equal to n+sod(n) for n = 1243130399 and 1243130408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143017 + ... + 151459.

It is an arithmetic number, because the mean of its divisors is an integer number (71816220).

Almost surely, 2^1243130434 is an apocalyptic number.

1243130434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1243130434 is a deficient number, since it is larger than the sum of its proper divisors (1054988606).

1243130434 is a wasteful number, since it uses less digits than its factorization.

1243130434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9274.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 1243130434 is about 35258.0548811190. The cubic root of 1243130434 is about 1075.2403815064.

Adding to 1243130434 its reverse (4340313421), we get a palindrome (5583443855).

The spelling of 1243130434 in words is "one billion, two hundred forty-three million, one hundred thirty thousand, four hundred thirty-four".