1959439 has 4 divisors (see below), whose sum is σ = 2044656. Its totient is φ = 1874224.

The previous prime is 1959427. The next prime is 1959457. The reversal of 1959439 is 9349591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9349591 = 233 ⋅40127.

It is not a de Polignac number, because 1959439 - 2⁵ = 1959407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1959239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42574 + ... + 42619.

It is an arithmetic number, because the mean of its divisors is an integer number (511164).

2^1959439 is an apocalyptic number.

1959439 is a deficient number, since it is larger than the sum of its proper divisors (85217).

1959439 is an equidigital number, since it uses as much as digits as its factorization.

1959439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85216.

The product of its digits is 43740, while the sum is 40.

The square root of 1959439 is about 1399.7996285183. The cubic root of 1959439 is about 125.1345537769.

The spelling of 1959439 in words is "one million, nine hundred fifty-nine thousand, four hundred thirty-nine".