1982139 has 8 divisors (see below), whose sum is σ = 2649360. Its totient is φ = 1318176.

The previous prime is 1982129. The next prime is 1982153. The reversal of 1982139 is 9312891.

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

It is not a de Polignac number, because 1982139 - 2⁷ = 1982011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1982129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1977 + ... + 2805.

It is an arithmetic number, because the mean of its divisors is an integer number (331170).

2^1982139 is an apocalyptic number.

1982139 is a deficient number, since it is larger than the sum of its proper divisors (667221).

1982139 is an equidigital number, since it uses as much as digits as its factorization.

1982139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629.

The product of its digits is 3888, while the sum is 33.

The square root of 1982139 is about 1407.8845833377. The cubic root of 1982139 is about 125.6159254354.

The spelling of 1982139 in words is "one million, nine hundred eighty-two thousand, one hundred thirty-nine".