140532321 has 4 divisors (see below), whose sum is σ = 187376432. Its totient is φ = 93688212.

The previous prime is 140532317. The next prime is 140532361. The reversal of 140532321 is 123235041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 140532321 - 2² = 140532317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140532311) 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, 23422051 + ... + 23422056.

It is an arithmetic number, because the mean of its divisors is an integer number (46844108).

Almost surely, 2^140532321 is an apocalyptic number.

It is an amenable number.

140532321 is a deficient number, since it is larger than the sum of its proper divisors (46844111).

140532321 is an equidigital number, since it uses as much as digits as its factorization.

140532321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46844110.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 140532321 is about 11854.6328918276. The cubic root of 140532321 is about 519.9066906046.

Adding to 140532321 its reverse (123235041), we get a palindrome (263767362).

The spelling of 140532321 in words is "one hundred forty million, five hundred thirty-two thousand, three hundred twenty-one".