7215425 has 12 divisors (see below), whose sum is σ = 10225536. Its totient is φ = 4947600.

The previous prime is 7215419. The next prime is 7215427. The reversal of 7215425 is 5245127.

It is not a de Polignac number, because 7215425 - 2¹² = 7211329 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 = 7215394 and 7215403.

It is not an unprimeable number, because it can be changed into a prime (7215427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20441 + ... + 20790.

It is an arithmetic number, because the mean of its divisors is an integer number (852128).

Almost surely, 2^7215425 is an apocalyptic number.

It is an amenable number.

7215425 is a deficient number, since it is larger than the sum of its proper divisors (3010111).

7215425 is a wasteful number, since it uses less digits than its factorization.

7215425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41248 (or 41243 counting only the distinct ones).

The product of its digits is 2800, while the sum is 26.

The square root of 7215425 is about 2686.1543142567. The cubic root of 7215425 is about 193.2356736918.

The spelling of 7215425 in words is "seven million, two hundred fifteen thousand, four hundred twenty-five".