45312145 has 4 divisors (see below), whose sum is σ = 54374580. Its totient is φ = 36249712.

The previous prime is 45312143. The next prime is 45312149. The reversal of 45312145 is 54121354.

It is a happy number.

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 4875264 + 40436881 = 2208^2 + 6359^2 .

It is a cyclic number.

It is not a de Polignac number, because 45312145 - 2¹ = 45312143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45312143) 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, 4531210 + ... + 4531219.

It is an arithmetic number, because the mean of its divisors is an integer number (13593645).

Almost surely, 2^45312145 is an apocalyptic number.

It is an amenable number.

45312145 is a deficient number, since it is larger than the sum of its proper divisors (9062435).

45312145 is an equidigital number, since it uses as much as digits as its factorization.

45312145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9062434.

The product of its digits is 2400, while the sum is 25.

The square root of 45312145 is about 6731.4296401285. The cubic root of 45312145 is about 356.5098557573.

Adding to 45312145 its reverse (54121354), we get a palindrome (99433499).

The spelling of 45312145 in words is "forty-five million, three hundred twelve thousand, one hundred forty-five".