158420 has 18 divisors (see below), whose sum is σ = 336462. Its totient is φ = 62656.

The previous prime is 158419. The next prime is 158429. The reversal of 158420 is 24851.

158420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 16 + 158404 = 4^2 + 398^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 158392 and 158401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1736 + ... + 1824.

2¹⁵⁸⁴²⁰ is an apocalyptic number.

158420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158420 is an abundant number, since it is smaller than the sum of its proper divisors (178042).

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

158420 is an equidigital number, since it uses as much as digits as its factorization.

158420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 158420 is about 398.0200999950. The cubic root of 158420 is about 54.1090617056.

Multiplying 158420 by its sum of digits (20), we get a square (3168400 = 1780²).

158420 divided by its sum of digits (20) gives a square (7921 = 89²).

Multiplying 158420 by its product of nonzero digits (320), we get a square (50694400 = 7120²).

The spelling of 158420 in words is "one hundred fifty-eight thousand, four hundred twenty".