1381138 has 16 divisors (see below), whose sum is σ = 2296224. Its totient is φ = 617760.

The previous prime is 1381111. The next prime is 1381141. The reversal of 1381138 is 8311831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1006 + ... + 1942.

It is an arithmetic number, because the mean of its divisors is an integer number (143514).

2^1381138 is an apocalyptic number.

1381138 is a deficient number, since it is larger than the sum of its proper divisors (915086).

1381138 is a wasteful number, since it uses less digits than its factorization.

1381138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017.

The product of its digits is 576, while the sum is 25.

The square root of 1381138 is about 1175.2182775978. The cubic root of 1381138 is about 111.3642230454.

Adding to 1381138 its reverse (8311831), we get a palindrome (9692969).

The spelling of 1381138 in words is "one million, three hundred eighty-one thousand, one hundred thirty-eight".