1981132 has 12 divisors (see below), whose sum is σ = 3484096. Its totient is φ = 985680.

The previous prime is 1981099. The next prime is 1981141. The reversal of 1981132 is 2311891.

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1981097 and 1981106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219 + ... + 2002.

2^1981132 is an apocalyptic number.

It is an amenable number.

1981132 is a deficient number, since it is larger than the sum of its proper divisors (1502964).

1981132 is a wasteful number, since it uses less digits than its factorization.

1981132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448 (or 2446 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 1981132 is about 1407.5269091566. The cubic root of 1981132 is about 125.5946493184.

The spelling of 1981132 in words is "one million, nine hundred eighty-one thousand, one hundred thirty-two".