2520545 has 8 divisors (see below), whose sum is σ = 3056424. Its totient is φ = 1995264.

The previous prime is 2520503. The next prime is 2520577. The reversal of 2520545 is 5450252.

It can be written as a sum of positive squares in 4 ways, for example, as 185761 + 2334784 = 431^2 + 1528^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2520545 - 2⁶ = 2520481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2520545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114 + ... + 3083.

It is an arithmetic number, because the mean of its divisors is an integer number (382053).

2^2520545 is an apocalyptic number.

It is an amenable number.

2520545 is a deficient number, since it is larger than the sum of its proper divisors (535879).

2520545 is an equidigital number, since it uses as much as digits as its factorization.

2520545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5299.

The product of its (nonzero) digits is 2000, while the sum is 23.

The square root of 2520545 is about 1587.6224362234. The cubic root of 2520545 is about 136.0916517448.

Adding to 2520545 its reverse (5450252), we get a palindrome (7970797).

It can be divided in two parts, 25205 and 45, that multiplied together give a square (1134225 = 1065²).

The spelling of 2520545 in words is "two million, five hundred twenty thousand, five hundred forty-five".