2505445 has 4 divisors (see below), whose sum is σ = 3006540. Its totient is φ = 2004352.

The previous prime is 2505421. The next prime is 2505457. The reversal of 2505445 is 5445052.

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 471969 + 2033476 = 687^2 + 1426^2 .

It is a cyclic number.

It is not a de Polignac number, because 2505445 - 2¹⁵ = 2472677 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, 250540 + ... + 250549.

It is an arithmetic number, because the mean of its divisors is an integer number (751635).

2^2505445 is an apocalyptic number.

It is an amenable number.

2505445 is a deficient number, since it is larger than the sum of its proper divisors (501095).

2505445 is an equidigital number, since it uses as much as digits as its factorization.

2505445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501094.

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 2505445 is about 1582.8597537369. The cubic root of 2505445 is about 135.8193427404.

The spelling of 2505445 in words is "two million, five hundred five thousand, four hundred forty-five".