140781 has 8 divisors (see below), whose sum is σ = 189504. Its totient is φ = 92960.

The previous prime is 140779. The next prime is 140797. The reversal of 140781 is 187041.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140781 - 2¹ = 140779 is a prime.

It is a super-2 number, since 2×140781² = 39638579922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361 + ... + 641.

It is an arithmetic number, because the mean of its divisors is an integer number (23688).

2¹⁴⁰⁷⁸¹ is an apocalyptic number.

It is an amenable number.

140781 is a deficient number, since it is larger than the sum of its proper divisors (48723).

140781 is a wasteful number, since it uses less digits than its factorization.

140781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 140781 is about 375.2079423466. The cubic root of 140781 is about 52.0213176895.

The spelling of 140781 in words is "one hundred forty thousand, seven hundred eighty-one".