158185242 has 24 divisors (see below), whose sum is σ = 342983316. Its totient is φ = 52690176.

The previous prime is 158185229. The next prime is 158185243. The reversal of 158185242 is 242581851.

It can be written as a sum of positive squares in 2 ways, for example, as 112338801 + 45846441 = 10599^2 + 6771^2 .

It is a junction number, because it is equal to n+sod(n) for n = 158185197 and 158185206.

It is not an unprimeable number, because it can be changed into a prime (158185243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34128 + ... + 38484.

Almost surely, 2^158185242 is an apocalyptic number.

158185242 is an abundant number, since it is smaller than the sum of its proper divisors (184798074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158185242 is a wasteful number, since it uses less digits than its factorization.

158185242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6382 (or 6379 counting only the distinct ones).

The product of its digits is 25600, while the sum is 36.

The square root of 158185242 is about 12577.1714626143. The cubic root of 158185242 is about 540.8232094314.

The spelling of 158185242 in words is "one hundred fifty-eight million, one hundred eighty-five thousand, two hundred forty-two".