140530757 has 4 divisors (see below), whose sum is σ = 141820140. Its totient is φ = 139241376.

The previous prime is 140530729. The next prime is 140530771. The reversal of 140530757 is 757035041.

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

It can be written as a sum of positive squares in 2 ways, for example, as 84070561 + 56460196 = 9169^2 + 7514^2 .

It is a cyclic number.

It is not a de Polignac number, because 140530757 - 2⁸ = 140530501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140530727) 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, 644528 + ... + 644745.

It is an arithmetic number, because the mean of its divisors is an integer number (35455035).

Almost surely, 2^140530757 is an apocalyptic number.

It is an amenable number.

140530757 is a deficient number, since it is larger than the sum of its proper divisors (1289383).

140530757 is a wasteful number, since it uses less digits than its factorization.

140530757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289382.

The product of its (nonzero) digits is 14700, while the sum is 32.

The square root of 140530757 is about 11854.5669258729. The cubic root of 140530757 is about 519.9047618974.

Adding to 140530757 its reverse (757035041), we get a palindrome (897565798).

The spelling of 140530757 in words is "one hundred forty million, five hundred thirty thousand, seven hundred fifty-seven".