1340124243 has 4 divisors (see below), whose sum is σ = 1786832328. Its totient is φ = 893416160.

The previous prime is 1340124241. The next prime is 1340124271. The reversal of 1340124243 is 3424210431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340124243 - 2¹ = 1340124241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340124241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223354038 + ... + 223354043.

It is an arithmetic number, because the mean of its divisors is an integer number (446708082).

Almost surely, 2^1340124243 is an apocalyptic number.

1340124243 is a deficient number, since it is larger than the sum of its proper divisors (446708085).

1340124243 is an equidigital number, since it uses as much as digits as its factorization.

1340124243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446708084.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1340124243 is about 36607.7074261692. The cubic root of 1340124243 is about 1102.5078436924.

Adding to 1340124243 its reverse (3424210431), we get a palindrome (4764334674).

The spelling of 1340124243 in words is "one billion, three hundred forty million, one hundred twenty-four thousand, two hundred forty-three".