1243135530 has 96 divisors (see below), whose sum is σ = 3978059904. Its totient is φ = 262286208.

The previous prime is 1243135499. The next prime is 1243135541. The reversal of 1243135530 is 355313421.

1243135530 is a `hidden beast` number, since 124 + 3 + 1 + 3 + 5 + 530 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1243135494 and 1243135503.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67704 + ... + 84083.

It is an arithmetic number, because the mean of its divisors is an integer number (41438124).

Almost surely, 2^1243135530 is an apocalyptic number.

1243135530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1243135530 is an abundant number, since it is smaller than the sum of its proper divisors (2734924374).

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

1243135530 is a wasteful number, since it uses less digits than its factorization.

1243135530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151820 (or 151817 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

The square root of 1243135530 is about 35258.1271482193. The cubic root of 1243135530 is about 1075.2418507589.

Adding to 1243135530 its reverse (355313421), we get a palindrome (1598448951).

It can be divided in two parts, 12431 and 35530, that added together give a square (47961 = 219²).

The spelling of 1243135530 in words is "one billion, two hundred forty-three million, one hundred thirty-five thousand, five hundred thirty".