1981032 has 32 divisors (see below), whose sum is σ = 4989600. Its totient is φ = 655424.

The previous prime is 1980991. The next prime is 1981037. The reversal of 1981032 is 2301891.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1980993 and 1981011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981037) 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 7 ways as a sum of consecutive naturals, for example, 4519 + ... + 4937.

It is an arithmetic number, because the mean of its divisors is an integer number (155925).

2^1981032 is an apocalyptic number.

1981032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1981032 is an abundant number, since it is smaller than the sum of its proper divisors (3008568).

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

1981032 is a wasteful number, since it uses less digits than its factorization.

1981032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1981032 is about 1407.4913854088. The cubic root of 1981032 is about 125.5925361029.

The spelling of 1981032 in words is "one million, nine hundred eighty-one thousand, thirty-two".