1385266243 has 2 divisors, whose sum is σ = 1385266244. Its totient is φ = 1385266242.

The previous prime is 1385266163. The next prime is 1385266249. The reversal of 1385266243 is 3426625831.

It is a strong prime.

It is an emirp because it is prime and its reverse (3426625831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1385266243 - 2⁹ = 1385265731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1385266196 and 1385266205.

It is not a weakly prime, because it can be changed into another prime (1385266249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692633121 + 692633122.

It is an arithmetic number, because the mean of its divisors is an integer number (692633122).

Almost surely, 2^1385266243 is an apocalyptic number.

1385266243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385266243 is an equidigital number, since it uses as much as digits as its factorization.

1385266243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The square root of 1385266243 is about 37219.1649960071. The cubic root of 1385266243 is about 1114.7506914430.

The spelling of 1385266243 in words is "one billion, three hundred eighty-five million, two hundred sixty-six thousand, two hundred forty-three".