1240130243 has 8 divisors (see below), whose sum is σ = 1361171136. Its totient is φ = 1120473000.

The previous prime is 1240130201. The next prime is 1240130267. The reversal of 1240130243 is 3420310421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1240130243 - 2⁶ = 1240130179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1240133243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344033 + ... + 347618.

It is an arithmetic number, because the mean of its divisors is an integer number (170146392).

Almost surely, 2^1240130243 is an apocalyptic number.

1240130243 is a deficient number, since it is larger than the sum of its proper divisors (121040893).

1240130243 is a wasteful number, since it uses less digits than its factorization.

1240130243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691825.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1240130243 is about 35215.4830010892. The cubic root of 1240130243 is about 1074.3746838880.

Adding to 1240130243 its reverse (3420310421), we get a palindrome (4660440664).

The spelling of 1240130243 in words is "one billion, two hundred forty million, one hundred thirty thousand, two hundred forty-three".