2780625 has 20 divisors (see below), whose sum is σ = 4636016. Its totient is φ = 1482000.

The previous prime is 2780623. The next prime is 2780641. The reversal of 2780625 is 5260872.

It is not a de Polignac number, because 2780625 - 2¹ = 2780623 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2780592 and 2780601.

It is not an unprimeable number, because it can be changed into a prime (2780621) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1134 + ... + 2616.

2^2780625 is an apocalyptic number.

2780625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2780625 is a deficient number, since it is larger than the sum of its proper divisors (1855391).

2780625 is an equidigital number, since it uses as much as digits as its factorization.

2780625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2780625 is about 1667.5206145652. The cubic root of 2780625 is about 140.6201232877.

The spelling of 2780625 in words is "two million, seven hundred eighty thousand, six hundred twenty-five".