45239785 has 4 divisors (see below), whose sum is σ = 54287748. Its totient is φ = 36191824.

The previous prime is 45239783. The next prime is 45239791. The reversal of 45239785 is 58793254.

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 21939856 + 23299929 = 4684^2 + 4827^2 .

It is a cyclic number.

It is not a de Polignac number, because 45239785 - 2¹ = 45239783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45239783) 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, 4523974 + ... + 4523983.

It is an arithmetic number, because the mean of its divisors is an integer number (13571937).

Almost surely, 2^45239785 is an apocalyptic number.

It is an amenable number.

45239785 is a deficient number, since it is larger than the sum of its proper divisors (9047963).

45239785 is an equidigital number, since it uses as much as digits as its factorization.

45239785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9047962.

The product of its digits is 302400, while the sum is 43.

The square root of 45239785 is about 6726.0527057108. The cubic root of 45239785 is about 356.3199817377.

The spelling of 45239785 in words is "forty-five million, two hundred thirty-nine thousand, seven hundred eighty-five".