1381111286 has 4 divisors (see below), whose sum is σ = 2071666932. Its totient is φ = 690555642.

The previous prime is 1381111279. The next prime is 1381111289. The reversal of 1381111286 is 6821111831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6821111831 = 5821 ⋅1171811.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381111289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345277820 + ... + 345277823.

It is an arithmetic number, because the mean of its divisors is an integer number (517916733).

Almost surely, 2^1381111286 is an apocalyptic number.

1381111286 is a deficient number, since it is larger than the sum of its proper divisors (690555646).

1381111286 is an equidigital number, since it uses as much as digits as its factorization.

1381111286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690555645.

The product of its digits is 2304, while the sum is 32.

The square root of 1381111286 is about 37163.3056387615. The cubic root of 1381111286 is about 1113.6350503772.

The spelling of 1381111286 in words is "one billion, three hundred eighty-one million, one hundred eleven thousand, two hundred eighty-six".