1881369 has 12 divisors (see below), whose sum is σ = 3105856. Its totient is φ = 1075032.

The previous prime is 1881349. The next prime is 1881389. The reversal of 1881369 is 9631881.

It is an interprime number because it is at equal distance from previous prime (1881349) and next prime (1881389).

It is not a de Polignac number, because 1881369 - 2⁷ = 1881241 is a prime.

It is a super-2 number, since 2×1881369² = 7079098628322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1881329) 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 11 ways as a sum of consecutive naturals, for example, 14869 + ... + 14994.

2^1881369 is an apocalyptic number.

It is an amenable number.

1881369 is a deficient number, since it is larger than the sum of its proper divisors (1224487).

1881369 is a wasteful number, since it uses less digits than its factorization.

1881369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29876 (or 29873 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1881369 is about 1371.6300521642. The cubic root of 1881369 is about 123.4500664128.

The spelling of 1881369 in words is "one million, eight hundred eighty-one thousand, three hundred sixty-nine".