1356742243 has 4 divisors (see below), whose sum is σ = 1356868440. Its totient is φ = 1356616048.

The previous prime is 1356742237. The next prime is 1356742301. The reversal of 1356742243 is 3422476531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3422476531 = 83 ⋅41234657.

It is a cyclic number.

It is not a de Polignac number, because 1356742243 - 2²⁹ = 819871331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1356742043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45298 + ... + 69031.

It is an arithmetic number, because the mean of its divisors is an integer number (339217110).

Almost surely, 2^1356742243 is an apocalyptic number.

1356742243 is a deficient number, since it is larger than the sum of its proper divisors (126197).

1356742243 is a wasteful number, since it uses less digits than its factorization.

1356742243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126196.

The product of its digits is 120960, while the sum is 37.

The square root of 1356742243 is about 36833.9821767889. The cubic root of 1356742243 is about 1107.0462940203.

The spelling of 1356742243 in words is "one billion, three hundred fifty-six million, seven hundred forty-two thousand, two hundred forty-three".