2445645 has 16 divisors (see below), whose sum is σ = 3997440. Its totient is φ = 1276224.

The previous prime is 2445629. The next prime is 2445647. The reversal of 2445645 is 5465442.

It is not a de Polignac number, because 2445645 - 2⁴ = 2445629 is a prime.

It is a super-3 number, since 3×2445645³ = 43883524965560133375, which contains 333 as substring.

2445645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2445647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030 + ... + 2439.

It is an arithmetic number, because the mean of its divisors is an integer number (249840).

2^2445645 is an apocalyptic number.

It is an amenable number.

2445645 is a deficient number, since it is larger than the sum of its proper divisors (1551795).

2445645 is a wasteful number, since it uses less digits than its factorization.

2445645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524.

The product of its digits is 19200, while the sum is 30.

The square root of 2445645 is about 1563.8558117678. The cubic root of 2445645 is about 134.7300504105.

The spelling of 2445645 in words is "two million, four hundred forty-five thousand, six hundred forty-five".