45724145 has 4 divisors (see below), whose sum is σ = 54868980. Its totient is φ = 36579312.

The previous prime is 45724141. The next prime is 45724157. The reversal of 45724145 is 54142754.

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 6574096 + 39150049 = 2564^2 + 6257^2 .

It is a cyclic number.

It is not a de Polignac number, because 45724145 - 2² = 45724141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (45724141) 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, 4572410 + ... + 4572419.

It is an arithmetic number, because the mean of its divisors is an integer number (13717245).

Almost surely, 2^45724145 is an apocalyptic number.

It is an amenable number.

45724145 is a deficient number, since it is larger than the sum of its proper divisors (9144835).

45724145 is an equidigital number, since it uses as much as digits as its factorization.

45724145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9144834.

The product of its digits is 22400, while the sum is 32.

The square root of 45724145 is about 6761.9631025317. The cubic root of 45724145 is about 357.5871175044.

Adding to 45724145 its reverse (54142754), we get a palindrome (99866899).

The spelling of 45724145 in words is "forty-five million, seven hundred twenty-four thousand, one hundred forty-five".