7725245 has 18 divisors (see below), whose sum is σ = 10280634. Its totient is φ = 5568640.

The previous prime is 7725241. The next prime is 7725269. The reversal of 7725245 is 5425277.

It can be written as a sum of positive squares in 3 ways, for example, as 813604 + 6911641 = 902^2 + 2629^2 .

It is not a de Polignac number, because 7725245 - 2² = 7725241 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7725241) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 68309 + ... + 68421.

Almost surely, 2^7725245 is an apocalyptic number.

It is an amenable number.

7725245 is a deficient number, since it is larger than the sum of its proper divisors (2555389).

7725245 is a wasteful number, since it uses less digits than its factorization.

7725245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253 (or 129 counting only the distinct ones).

The product of its digits is 19600, while the sum is 32.

The square root of 7725245 is about 2779.4324960322. The cubic root of 7725245 is about 197.6836512106.

Adding to 7725245 its sum of digits (32), we get a palindrome (7725277).

Subtracting from 7725245 its reverse (5425277), we obtain a cube (2299968 = 132³).

The spelling of 7725245 in words is "seven million, seven hundred twenty-five thousand, two hundred forty-five".