158421606 has 96 divisors (see below), whose sum is σ = 404079840. Its totient is φ = 41094144.

The previous prime is 158421569. The next prime is 158421617. The reversal of 158421606 is 606124851.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 144396 + ... + 145488.

It is an arithmetic number, because the mean of its divisors is an integer number (4209165).

Almost surely, 2^158421606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158421606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202039920).

158421606 is an abundant number, since it is smaller than the sum of its proper divisors (245658234).

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

158421606 is a wasteful number, since it uses less digits than its factorization.

158421606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1151 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 158421606 is about 12586.5645034696. The cubic root of 158421606 is about 541.0924455053.

The spelling of 158421606 in words is "one hundred fifty-eight million, four hundred twenty-one thousand, six hundred six".