1340244243 has 48 divisors (see below), whose sum is σ = 2137873920. Its totient is φ = 804053952.

The previous prime is 1340244233. The next prime is 1340244259. The reversal of 1340244243 is 3424420431.

It is a happy number.

1340244243 is a `hidden beast` number, since 13 + 402 + 4 + 4 + 243 = 666.

It is not a de Polignac number, because 1340244243 - 2⁶ = 1340244179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1340244223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 766296 + ... + 768042.

It is an arithmetic number, because the mean of its divisors is an integer number (44539040).

Almost surely, 2^1340244243 is an apocalyptic number.

1340244243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1340244243 is a deficient number, since it is larger than the sum of its proper divisors (797629677).

1340244243 is a wasteful number, since it uses less digits than its factorization.

1340244243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928 (or 1925 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 1340244243 is about 36609.3463885932. The cubic root of 1340244243 is about 1102.5407503410.

Adding to 1340244243 its reverse (3424420431), we get a palindrome (4764664674).

The spelling of 1340244243 in words is "one billion, three hundred forty million, two hundred forty-four thousand, two hundred forty-three".