45140321 has 4 divisors (see below), whose sum is σ = 47795652. Its totient is φ = 42484992.

The previous prime is 45140311. The next prime is 45140323. The reversal of 45140321 is 12304154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12304154 = 2 ⋅6152077.

It can be written as a sum of positive squares in 2 ways, for example, as 17430625 + 27709696 = 4175^2 + 5264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45140321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45140293 and 45140302.

It is not an unprimeable number, because it can be changed into a prime (45140323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1327640 + ... + 1327673.

It is an arithmetic number, because the mean of its divisors is an integer number (11948913).

Almost surely, 2^45140321 is an apocalyptic number.

It is an amenable number.

45140321 is a deficient number, since it is larger than the sum of its proper divisors (2655331).

45140321 is a wasteful number, since it uses less digits than its factorization.

45140321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655330.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 45140321 is about 6718.6547016497. The cubic root of 45140321 is about 356.0586555921.

Adding to 45140321 its reverse (12304154), we get a palindrome (57444475).

The spelling of 45140321 in words is "forty-five million, one hundred forty thousand, three hundred twenty-one".