6445045 has 4 divisors (see below), whose sum is σ = 7734060. Its totient is φ = 5156032.

The previous prime is 6445003. The next prime is 6445051. The reversal of 6445045 is 5405446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5405446 = 2 ⋅2702723.

It can be written as a sum of positive squares in 2 ways, for example, as 5026564 + 1418481 = 2242^2 + 1191^2 .

It is a cyclic number.

It is not a de Polignac number, because 6445045 - 2⁹ = 6444533 is a prime.

It is a congruent 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, 644500 + ... + 644509.

It is an arithmetic number, because the mean of its divisors is an integer number (1933515).

Almost surely, 2^6445045 is an apocalyptic number.

It is an amenable number.

6445045 is a deficient number, since it is larger than the sum of its proper divisors (1289015).

6445045 is a wasteful number, since it uses less digits than its factorization.

6445045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289014.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 6445045 is about 2538.7093177440. The cubic root of 6445045 is about 186.0981195027.

The spelling of 6445045 in words is "six million, four hundred forty-five thousand, forty-five".