2642545 has 4 divisors (see below), whose sum is σ = 3171060. Its totient is φ = 2114032.

The previous prime is 2642543. The next prime is 2642561. The reversal of 2642545 is 5452462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5452462 = 2 ⋅2726231.

It can be written as a sum of positive squares in 2 ways, for example, as 1846881 + 795664 = 1359^2 + 892^2 .

It is a cyclic number.

It is not a de Polignac number, because 2642545 - 2¹ = 2642543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2642543) 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, 264250 + ... + 264259.

It is an arithmetic number, because the mean of its divisors is an integer number (792765).

2^2642545 is an apocalyptic number.

It is an amenable number.

2642545 is a deficient number, since it is larger than the sum of its proper divisors (528515).

2642545 is an equidigital number, since it uses as much as digits as its factorization.

2642545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528514.

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

The square root of 2642545 is about 1625.5906618826. The cubic root of 2642545 is about 138.2528620213.

It can be divided in two parts, 264 and 2545, that added together give a square (2809 = 53²).

The spelling of 2642545 in words is "two million, six hundred forty-two thousand, five hundred forty-five".