140520 has 32 divisors (see below), whose sum is σ = 421920. Its totient is φ = 37440.

The previous prime is 140477. The next prime is 140521. The reversal of 140520 is 25041.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 140496 and 140505.

It is not an unprimeable number, because it can be changed into a prime (140521) by changing a digit.

140520 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 7 ways as a sum of consecutive naturals, for example, 466 + ... + 705.

It is an arithmetic number, because the mean of its divisors is an integer number (13185).

2¹⁴⁰⁵²⁰ is an apocalyptic number.

140520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140520 is an abundant number, since it is smaller than the sum of its proper divisors (281400).

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

140520 is a wasteful number, since it uses less digits than its factorization.

140520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 140520 is about 374.8599738569. The cubic root of 140520 is about 51.9891496099.

Adding to 140520 its reverse (25041), we get a palindrome (165561).

The spelling of 140520 in words is "one hundred forty thousand, five hundred twenty".