4515545 has 4 divisors (see below), whose sum is σ = 5418660. Its totient is φ = 3612432.

The previous prime is 4515541. The next prime is 4515551. The reversal of 4515545 is 5455154.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5455154 = 2 ⋅2727577.

It can be written as a sum of positive squares in 2 ways, for example, as 1261129 + 3254416 = 1123^2 + 1804^2 .

It is a cyclic number.

It is not a de Polignac number, because 4515545 - 2² = 4515541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4515541) 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, 451550 + ... + 451559.

It is an arithmetic number, because the mean of its divisors is an integer number (1354665).

Almost surely, 2^4515545 is an apocalyptic number.

It is an amenable number.

4515545 is a deficient number, since it is larger than the sum of its proper divisors (903115).

4515545 is an equidigital number, since it uses as much as digits as its factorization.

4515545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903114.

The product of its digits is 10000, while the sum is 29.

The square root of 4515545 is about 2124.9811763872. The cubic root of 4515545 is about 165.2862493650.

The spelling of 4515545 in words is "four million, five hundred fifteen thousand, five hundred forty-five".