2545605 has 12 divisors (see below), whose sum is σ = 4412460. Its totient is φ = 1357632.

The previous prime is 2545603. The next prime is 2545619. The reversal of 2545605 is 5065452.

2545605 is a `hidden beast` number, since 2 + 54 + 5 + 605 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1855044 + 690561 = 1362^2 + 831^2 .

It is not a de Polignac number, because 2545605 - 2¹ = 2545603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28240 + ... + 28329.

It is an arithmetic number, because the mean of its divisors is an integer number (367705).

2^2545605 is an apocalyptic number.

It is an amenable number.

2545605 is a deficient number, since it is larger than the sum of its proper divisors (1866855).

2545605 is a wasteful number, since it uses less digits than its factorization.

2545605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56580 (or 56577 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 2545605 is about 1595.4952209267. The cubic root of 2545605 is about 136.5411862996.

The spelling of 2545605 in words is "two million, five hundred forty-five thousand, six hundred five".