158942137 has 4 divisors (see below), whose sum is σ = 158987556. Its totient is φ = 158896720.

The previous prime is 158942131. The next prime is 158942141. The reversal of 158942137 is 731249851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731249851 = 53 ⋅13797167.

It can be written as a sum of positive squares in 2 ways, for example, as 102030201 + 56911936 = 10101^2 + 7544^2 .

It is a cyclic number.

It is not a de Polignac number, because 158942137 - 2⁷ = 158942009 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158942137.

It is not an unprimeable number, because it can be changed into a prime (158942131) 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, 16978 + ... + 24619.

It is an arithmetic number, because the mean of its divisors is an integer number (39746889).

Almost surely, 2^158942137 is an apocalyptic number.

It is an amenable number.

158942137 is a deficient number, since it is larger than the sum of its proper divisors (45419).

158942137 is an equidigital number, since it uses as much as digits as its factorization.

158942137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45418.

The product of its digits is 60480, while the sum is 40.

The square root of 158942137 is about 12607.2255869402. The cubic root of 158942137 is about 541.6844259371.

The spelling of 158942137 in words is "one hundred fifty-eight million, nine hundred forty-two thousand, one hundred thirty-seven".