2520785 has 4 divisors (see below), whose sum is σ = 3024948. Its totient is φ = 2016624.

The previous prime is 2520781. The next prime is 2520797. The reversal of 2520785 is 5870252.

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 638401 + 1882384 = 799^2 + 1372^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520785 - 2² = 2520781 is a prime.

It is a d-powerful number, because it can be written as 2⁹ + 5⁶ + 2²¹ + 0 + 7⁵ + 8² + 5⁸ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520781) 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, 252074 + ... + 252083.

It is an arithmetic number, because the mean of its divisors is an integer number (756237).

2^2520785 is an apocalyptic number.

It is an amenable number.

2520785 is a deficient number, since it is larger than the sum of its proper divisors (504163).

2520785 is an equidigital number, since it uses as much as digits as its factorization.

2520785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504162.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 2520785 is about 1587.6980191460. The cubic root of 2520785 is about 136.0959710434.

The spelling of 2520785 in words is "two million, five hundred twenty thousand, seven hundred eighty-five".