45019985 has 4 divisors (see below), whose sum is σ = 54023988. Its totient is φ = 36015984.

The previous prime is 45019973. The next prime is 45020021. The reversal of 45019985 is 58991054.

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 27447121 + 17572864 = 5239^2 + 4192^2 .

It is a cyclic number.

It is not a de Polignac number, because 45019985 - 2¹⁴ = 45003601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4501994 + ... + 4502003.

It is an arithmetic number, because the mean of its divisors is an integer number (13505997).

Almost surely, 2^45019985 is an apocalyptic number.

It is an amenable number.

45019985 is a deficient number, since it is larger than the sum of its proper divisors (9004003).

45019985 is an equidigital number, since it uses as much as digits as its factorization.

45019985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9004002.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 45019985 is about 6709.6933611008. The cubic root of 45019985 is about 355.7419778506.

The spelling of 45019985 in words is "forty-five million, nineteen thousand, nine hundred eighty-five".