140820 has 24 divisors (see below), whose sum is σ = 394464. Its totient is φ = 37536.

The previous prime is 140813. The next prime is 140827. The reversal of 140820 is 28041.

It is an interprime number because it is at equal distance from previous prime (140813) and next prime (140827).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 140820.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140820.

It is not an unprimeable number, because it can be changed into a prime (140827) by changing a digit.

140820 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1114 + ... + 1233.

It is an arithmetic number, because the mean of its divisors is an integer number (16436).

2¹⁴⁰⁸²⁰ is an apocalyptic number.

140820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140820 is an abundant number, since it is smaller than the sum of its proper divisors (253644).

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

140820 is a wasteful number, since it uses less digits than its factorization.

140820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2359 (or 2357 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 140820 is about 375.2599099291. The cubic root of 140820 is about 52.0261209988.

Adding to 140820 its reverse (28041), we get a palindrome (168861).

The spelling of 140820 in words is "one hundred forty thousand, eight hundred twenty".