158722 has 8 divisors (see below), whose sum is σ = 242172. Its totient is φ = 78000.

The previous prime is 158699. The next prime is 158731. The reversal of 158722 is 227851.

It can be written as a sum of positive squares in 2 ways, for example, as 96721 + 62001 = 311^2 + 249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 529 + ... + 772.

2¹⁵⁸⁷²² is an apocalyptic number.

158722 is a deficient number, since it is larger than the sum of its proper divisors (83450).

158722 is a wasteful number, since it uses less digits than its factorization.

158722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364.

The product of its digits is 1120, while the sum is 25.

The square root of 158722 is about 398.3992971881. The cubic root of 158722 is about 54.1434230319.

The spelling of 158722 in words is "one hundred fifty-eight thousand, seven hundred twenty-two".