45028121 has 4 divisors (see below), whose sum is σ = 47676852. Its totient is φ = 42379392.

The previous prime is 45028099. The next prime is 45028133. The reversal of 45028121 is 12182054.

45028121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12182054 = 2 ⋅6091027.

It can be written as a sum of positive squares in 2 ways, for example, as 18361225 + 26666896 = 4285^2 + 5164^2 .

It is a cyclic number.

It is not a de Polignac number, because 45028121 - 2¹⁴ = 45011737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45028171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324340 + ... + 1324373.

It is an arithmetic number, because the mean of its divisors is an integer number (11919213).

Almost surely, 2^45028121 is an apocalyptic number.

It is an amenable number.

45028121 is a deficient number, since it is larger than the sum of its proper divisors (2648731).

45028121 is a wasteful number, since it uses less digits than its factorization.

45028121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2648730.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 45028121 is about 6710.2996207323. The cubic root of 45028121 is about 355.7634064257.

The spelling of 45028121 in words is "forty-five million, twenty-eight thousand, one hundred twenty-one".