45225421 has 4 divisors (see below), whose sum is σ = 46187712. Its totient is φ = 44263132.

The previous prime is 45225407. The next prime is 45225449. The reversal of 45225421 is 12452254.

45225421 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12452254 = 2 ⋅6226127.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45225421 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 (45225221) 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, 481075 + ... + 481168.

It is an arithmetic number, because the mean of its divisors is an integer number (11546928).

Almost surely, 2^45225421 is an apocalyptic number.

It is an amenable number.

45225421 is a deficient number, since it is larger than the sum of its proper divisors (962291).

45225421 is an equidigital number, since it uses as much as digits as its factorization.

45225421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962290.

The product of its digits is 3200, while the sum is 25.

The square root of 45225421 is about 6724.9848326967. The cubic root of 45225421 is about 356.2822662475.

Adding to 45225421 its reverse (12452254), we get a palindrome (57677675).

The spelling of 45225421 in words is "forty-five million, two hundred twenty-five thousand, four hundred twenty-one".