2821625 has 8 divisors (see below), whose sum is σ = 3521544. Its totient is φ = 2257200.

The previous prime is 2821607. The next prime is 2821627. The reversal of 2821625 is 5261282.

It can be written as a sum of positive squares in 4 ways, for example, as 619369 + 2202256 = 787^2 + 1484^2 .

It is not a de Polignac number, because 2821625 - 2⁸ = 2821369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2821594 and 2821603.

It is not an unprimeable number, because it can be changed into a prime (2821627) 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 7 ways as a sum of consecutive naturals, for example, 11162 + ... + 11411.

It is an arithmetic number, because the mean of its divisors is an integer number (440193).

2^2821625 is an apocalyptic number.

2821625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2821625 is a deficient number, since it is larger than the sum of its proper divisors (699919).

2821625 is an equidigital number, since it uses as much as digits as its factorization.

2821625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22588 (or 22578 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 2821625 is about 1679.7693294021. The cubic root of 2821625 is about 141.3078964892.

The spelling of 2821625 in words is "two million, eight hundred twenty-one thousand, six hundred twenty-five".