1959143 has 4 divisors (see below), whose sum is σ = 1969488. Its totient is φ = 1948800.

The previous prime is 1959091. The next prime is 1959149. The reversal of 1959143 is 3419591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3419591 = 7 ⋅488513.

It is a cyclic number.

It is not a de Polignac number, because 1959143 - 2⁶ = 1959079 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 (1959149) 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, 4883 + ... + 5268.

It is an arithmetic number, because the mean of its divisors is an integer number (492372).

2^1959143 is an apocalyptic number.

1959143 is a deficient number, since it is larger than the sum of its proper divisors (10345).

1959143 is a wasteful number, since it uses less digits than its factorization.

1959143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10344.

The product of its digits is 4860, while the sum is 32.

The square root of 1959143 is about 1399.6938951071. The cubic root of 1959143 is about 125.1282523656.

The spelling of 1959143 in words is "one million, nine hundred fifty-nine thousand, one hundred forty-three".