1340202443 has 4 divisors (see below), whose sum is σ = 1350433128. Its totient is φ = 1329971760.

The previous prime is 1340202421. The next prime is 1340202469. The reversal of 1340202443 is 3442020431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3442020431 = 71 ⋅48479161.

It is a cyclic number.

It is not a de Polignac number, because 1340202443 - 2¹² = 1340198347 is a prime.

It is a super-2 number, since 2×1340202443² = 3592285176446336498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340202473) 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, 5115146 + ... + 5115407.

It is an arithmetic number, because the mean of its divisors is an integer number (337608282).

Almost surely, 2^1340202443 is an apocalyptic number.

1340202443 is a deficient number, since it is larger than the sum of its proper divisors (10230685).

1340202443 is a wasteful number, since it uses less digits than its factorization.

1340202443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230684.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1340202443 is about 36608.7754916769. The cubic root of 1340202443 is about 1102.5292880814.

Adding to 1340202443 its reverse (3442020431), we get a palindrome (4782222874).

The spelling of 1340202443 in words is "one billion, three hundred forty million, two hundred two thousand, four hundred forty-three".