140815 has 4 divisors (see below), whose sum is σ = 168984. Its totient is φ = 112648.

The previous prime is 140813. The next prime is 140827. The reversal of 140815 is 518041.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140815 - 2¹ = 140813 is a prime.

It is a Duffinian number.

140815 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 140792 and 140801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14077 + ... + 14086.

It is an arithmetic number, because the mean of its divisors is an integer number (42246).

2¹⁴⁰⁸¹⁵ is an apocalyptic number.

140815 is a deficient number, since it is larger than the sum of its proper divisors (28169).

140815 is an equidigital number, since it uses as much as digits as its factorization.

140815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28168.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 140815 is about 375.2532478207. The cubic root of 140815 is about 52.0255052395.

Adding to 140815 its reverse (518041), we get a palindrome (658856).

The spelling of 140815 in words is "one hundred forty thousand, eight hundred fifteen".