1381919 has 16 divisors (see below), whose sum is σ = 1748736. Its totient is φ = 1060800.

The previous prime is 1381907. The next prime is 1381921. The reversal of 1381919 is 9191831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381919 is a prime.

It is a super-2 number, since 2×1381919² = 3819400245122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10019 + ... + 10155.

It is an arithmetic number, because the mean of its divisors is an integer number (109296).

2^1381919 is an apocalyptic number.

1381919 is a deficient number, since it is larger than the sum of its proper divisors (366817).

1381919 is a wasteful number, since it uses less digits than its factorization.

1381919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286.

The product of its digits is 1944, while the sum is 32.

The square root of 1381919 is about 1175.5505093359. The cubic root of 1381919 is about 111.3852103446.

The spelling of 1381919 in words is "one million, three hundred eighty-one thousand, nine hundred nineteen".