158740 has 12 divisors (see below), whose sum is σ = 333396. Its totient is φ = 63488.

The previous prime is 158731. The next prime is 158747. The reversal of 158740 is 47851.

158740 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 2 ways, for example, as 121104 + 37636 = 348^2 + 194^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158747) by changing a digit.

158740 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3949 + ... + 3988.

It is an arithmetic number, because the mean of its divisors is an integer number (27783).

2¹⁵⁸⁷⁴⁰ is an apocalyptic number.

158740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

158740 is an abundant number, since it is smaller than the sum of its proper divisors (174656).

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

158740 is a wasteful number, since it uses less digits than its factorization.

158740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7946 (or 7944 counting only the distinct ones).

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

The square root of 158740 is about 398.4218869490. The cubic root of 158740 is about 54.1454696811.

Subtracting from 158740 its reverse (47851), we obtain a square (110889 = 333²).

It can be divided in two parts, 158 and 740, that added together give a palindrome (898).

The spelling of 158740 in words is "one hundred fifty-eight thousand, seven hundred forty".