2528905 has 4 divisors (see below), whose sum is σ = 3034692. Its totient is φ = 2023120.

The previous prime is 2528899. The next prime is 2528923. The reversal of 2528905 is 5098252.

It is a happy number.

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 1901641 + 627264 = 1379^2 + 792^2 .

It is not a de Polignac number, because 2528905 - 2⁷ = 2528777 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

2528905 is a lucky 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, 252886 + ... + 252895.

It is an arithmetic number, because the mean of its divisors is an integer number (758673).

2^2528905 is an apocalyptic number.

It is an amenable number.

2528905 is a deficient number, since it is larger than the sum of its proper divisors (505787).

2528905 is an equidigital number, since it uses as much as digits as its factorization.

2528905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505786.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2528905 is about 1590.2531245057. The cubic root of 2528905 is about 136.2419460492.

The spelling of 2528905 in words is "two million, five hundred twenty-eight thousand, nine hundred five".