45019 has 4 divisors (see below), whose sum is σ = 48496. Its totient is φ = 41544.

The previous prime is 45013. The next prime is 45053. The reversal of 45019 is 91054.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 45019 - 2⁵ = 44987 is a prime.

It is a super-2 number, since 2×45019² = 4053420722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 44987 and 45005.

It is not an unprimeable number, because it can be changed into a prime (45013) 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, 1719 + ... + 1744.

It is an arithmetic number, because the mean of its divisors is an integer number (12124).

2⁴⁵⁰¹⁹ is an apocalyptic number.

45019 is the 123-rd hex number.

45019 is a deficient number, since it is larger than the sum of its proper divisors (3477).

45019 is a wasteful number, since it uses less digits than its factorization.

45019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3476.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 45019 is about 212.1768130593. The cubic root of 45019 is about 35.5739383385.

The spelling of 45019 in words is "forty-five thousand, nineteen".