2780125 has 16 divisors (see below), whose sum is σ = 3624192. Its totient is φ = 2125200.

The previous prime is 2780123. The next prime is 2780131. The reversal of 2780125 is 5210872.

It is not a de Polignac number, because 2780125 - 2¹ = 2780123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 2780125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2392 + ... + 3358.

It is an arithmetic number, because the mean of its divisors is an integer number (226512).

2^2780125 is an apocalyptic number.

2780125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2780125 is a deficient number, since it is larger than the sum of its proper divisors (844067).

2780125 is an equidigital number, since it uses as much as digits as its factorization.

2780125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1005 (or 995 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 2780125 is about 1667.3706846409. The cubic root of 2780125 is about 140.6116942143.

Adding to 2780125 its reverse (5210872), we get a palindrome (7990997).

The spelling of 2780125 in words is "two million, seven hundred eighty thousand, one hundred twenty-five".