1958143 has 6 divisors (see below), whose sum is σ = 2152472. Its totient is φ = 1780020.

The previous prime is 1958137. The next prime is 1958183. The reversal of 1958143 is 3418591.

It is not a de Polignac number, because 1958143 - 2¹⁷ = 1827071 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 (1958183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7971 + ... + 8212.

2^1958143 is an apocalyptic number.

1958143 is a deficient number, since it is larger than the sum of its proper divisors (194329).

1958143 is a wasteful number, since it uses less digits than its factorization.

1958143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16205 (or 16194 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 1958143 is about 1399.3366285494. The cubic root of 1958143 is about 125.1069591185.

It can be divided in two parts, 195 and 8143, that added together give a palindrome (8338).

The spelling of 1958143 in words is "one million, nine hundred fifty-eight thousand, one hundred forty-three".