140657 has 8 divisors (see below), whose sum is σ = 161760. Its totient is φ = 120960.

The previous prime is 140639. The next prime is 140659. The reversal of 140657 is 756041.

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 140657 - 2⁶ = 140593 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 140657.

It is not an unprimeable number, because it can be changed into a prime (140659) 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, 128 + ... + 545.

It is an arithmetic number, because the mean of its divisors is an integer number (20220).

2¹⁴⁰⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

140657 is a deficient number, since it is larger than the sum of its proper divisors (21103).

140657 is a wasteful number, since it uses less digits than its factorization.

140657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 140657 is about 375.0426642397. The cubic root of 140657 is about 52.0060397324.

Adding to 140657 its reverse (756041), we get a palindrome (896698).

It can be divided in two parts, 140 and 657, that added together give a palindrome (797).

The spelling of 140657 in words is "one hundred forty thousand, six hundred fifty-seven".