45442945 has 4 divisors (see below), whose sum is σ = 54531540. Its totient is φ = 36354352.

The previous prime is 45442939. The next prime is 45442949. The reversal of 45442945 is 54924454.

45442945 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.

It can be written as a sum of positive squares in 2 ways, for example, as 33269824 + 12173121 = 5768^2 + 3489^2 .

It is a cyclic number.

It is not a de Polignac number, because 45442945 - 2¹¹ = 45440897 is a prime.

It is a super-2 number, since 2×45442945² = 4130122500546050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45442949) 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, 4544290 + ... + 4544299.

It is an arithmetic number, because the mean of its divisors is an integer number (13632885).

Almost surely, 2^45442945 is an apocalyptic number.

It is an amenable number.

45442945 is a deficient number, since it is larger than the sum of its proper divisors (9088595).

45442945 is an equidigital number, since it uses as much as digits as its factorization.

45442945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9088594.

The product of its digits is 115200, while the sum is 37.

The square root of 45442945 is about 6741.1382570008. The cubic root of 45442945 is about 356.8525651380.

The spelling of 45442945 in words is "forty-five million, four hundred forty-two thousand, nine hundred forty-five".