2720725 has 18 divisors (see below), whose sum is σ = 3926274. Its totient is φ = 1864800.

The previous prime is 2720723. The next prime is 2720737. The reversal of 2720725 is 5270272.

2720725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 305809 + 2414916 = 553^2 + 1554^2 .

It is not a de Polignac number, because 2720725 - 2¹ = 2720723 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 2720725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2720723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 115 + ... + 2335.

2^2720725 is an apocalyptic number.

2720725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2720725 is a deficient number, since it is larger than the sum of its proper divisors (1205549).

2720725 is a wasteful number, since it uses less digits than its factorization.

2720725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245 (or 2233 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 2720725 is about 1649.4620335127. The cubic root of 2720725 is about 139.6030421912.

Adding to 2720725 its reverse (5270272), we get a palindrome (7990997).

The spelling of 2720725 in words is "two million, seven hundred twenty thousand, seven hundred twenty-five".