1982642 has 8 divisors (see below), whose sum is σ = 3148956. Its totient is φ = 932992.

The previous prime is 1982641. The next prime is 1982671. The reversal of 1982642 is 2462891.

It can be written as a sum of positive squares in 2 ways, for example, as 1852321 + 130321 = 1361^2 + 361^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1982599 and 1982608.

It is not an unprimeable number, because it can be changed into a prime (1982641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29123 + ... + 29190.

2^1982642 is an apocalyptic number.

1982642 is a deficient number, since it is larger than the sum of its proper divisors (1166314).

1982642 is a wasteful number, since it uses less digits than its factorization.

1982642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58332.

The product of its digits is 6912, while the sum is 32.

The square root of 1982642 is about 1408.0632088085. The cubic root of 1982642 is about 125.6265502313.

Subtracting 1982642 from its reverse (2462891), we obtain a square (480249 = 693²).

The spelling of 1982642 in words is "one million, nine hundred eighty-two thousand, six hundred forty-two".