158321142 has 80 divisors (see below), whose sum is σ = 408592800. Its totient is φ = 44883072.

The previous prime is 158321117. The next prime is 158321171. The reversal of 158321142 is 241123851.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 168498 + ... + 169434.

It is an arithmetic number, because the mean of its divisors is an integer number (5107410).

Almost surely, 2^158321142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158321142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204296400).

158321142 is an abundant number, since it is smaller than the sum of its proper divisors (250271658).

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

158321142 is a wasteful number, since it uses less digits than its factorization.

158321142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107 (or 1098 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 158321142 is about 12582.5729483282. The cubic root of 158321142 is about 540.9780423254.

Adding to 158321142 its reverse (241123851), we get a palindrome (399444993).

The spelling of 158321142 in words is "one hundred fifty-eight million, three hundred twenty-one thousand, one hundred forty-two".