1243745230 has 32 divisors (see below), whose sum is σ = 2755376064. Its totient is φ = 393624576.

The previous prime is 1243745219. The next prime is 1243745231. The reversal of 1243745230 is 325473421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1243745192 and 1243745201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243745231) 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 15 ways as a sum of consecutive naturals, for example, 682467 + ... + 684286.

It is an arithmetic number, because the mean of its divisors is an integer number (86105502).

Almost surely, 2^1243745230 is an apocalyptic number.

1243745230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1243745230 is an abundant number, since it is smaller than the sum of its proper divisors (1511630834).

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

1243745230 is a wasteful number, since it uses less digits than its factorization.

1243745230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366780.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 1243745230 is about 35266.7723218329. The cubic root of 1243745230 is about 1075.4176073554.

Subtracting from 1243745230 its reverse (325473421), we obtain a square (918271809 = 30303²).

The spelling of 1243745230 in words is "one billion, two hundred forty-three million, seven hundred forty-five thousand, two hundred thirty".