158143905 has 24 divisors (see below), whose sum is σ = 274496040. Its totient is φ = 84226560.

The previous prime is 158143901. The next prime is 158143913. The reversal of 158143905 is 509341851.

It can be written as a sum of positive squares in 4 ways, for example, as 2692881 + 155451024 = 1641^2 + 12468^2 .

It is not a de Polignac number, because 158143905 - 2² = 158143901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 158143905.

It is not an unprimeable number, because it can be changed into a prime (158143901) 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 23 ways as a sum of consecutive naturals, for example, 37651 + ... + 41639.

It is an arithmetic number, because the mean of its divisors is an integer number (11437335).

Almost surely, 2^158143905 is an apocalyptic number.

158143905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

158143905 is a deficient number, since it is larger than the sum of its proper divisors (116352135).

158143905 is a wasteful number, since it uses less digits than its factorization.

158143905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4881 (or 4878 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 158143905 is about 12575.5280207234. The cubic root of 158143905 is about 540.7760959832.

The spelling of 158143905 in words is "one hundred fifty-eight million, one hundred forty-three thousand, nine hundred five".