1881372 has 12 divisors (see below), whose sum is σ = 4389896. Its totient is φ = 627120.

The previous prime is 1881349. The next prime is 1881389. The reversal of 1881372 is 2731881.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 78379 + ... + 78402.

2^1881372 is an apocalyptic number.

1881372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1881372 is an abundant number, since it is smaller than the sum of its proper divisors (2508524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1881372 is a wasteful number, since it uses less digits than its factorization.

1881372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156788 (or 156786 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 1881372 is about 1371.6311457531. The cubic root of 1881372 is about 123.4501320299.

The spelling of 1881372 in words is "one million, eight hundred eighty-one thousand, three hundred seventy-two".