140530645 has 4 divisors (see below), whose sum is σ = 168636780. Its totient is φ = 112424512.

The previous prime is 140530639. The next prime is 140530661. The reversal of 140530645 is 546035041.

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 109683729 + 30846916 = 10473^2 + 5554^2 .

It is a cyclic number.

It is not a de Polignac number, because 140530645 - 2¹⁷ = 140399573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14053060 + ... + 14053069.

It is an arithmetic number, because the mean of its divisors is an integer number (42159195).

Almost surely, 2^140530645 is an apocalyptic number.

It is an amenable number.

140530645 is a deficient number, since it is larger than the sum of its proper divisors (28106135).

140530645 is an equidigital number, since it uses as much as digits as its factorization.

140530645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28106134.

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 140530645 is about 11854.5622019541. The cubic root of 140530645 is about 519.9046237798.

Adding to 140530645 its reverse (546035041), we get a palindrome (686565686).

The spelling of 140530645 in words is "one hundred forty million, five hundred thirty thousand, six hundred forty-five".