1381916 has 6 divisors (see below), whose sum is σ = 2418360. Its totient is φ = 690956.

The previous prime is 1381907. The next prime is 1381921. The reversal of 1381916 is 6191831.

It is a happy number.

1381916 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172736 + ... + 172743.

It is an arithmetic number, because the mean of its divisors is an integer number (403060).

2^1381916 is an apocalyptic number.

It is an amenable number.

1381916 is a deficient number, since it is larger than the sum of its proper divisors (1036444).

1381916 is a wasteful number, since it uses less digits than its factorization.

1381916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345483 (or 345481 counting only the distinct ones).

The product of its digits is 1296, while the sum is 29.

The square root of 1381916 is about 1175.5492333373. The cubic root of 1381916 is about 111.3851297427.

The spelling of 1381916 in words is "one million, three hundred eighty-one thousand, nine hundred sixteen".