1245031225 has 9 divisors (see below), whose sum is σ = 1544057517. Its totient is φ = 995883840.

The previous prime is 1245031211. The next prime is 1245031247. The reversal of 1245031225 is 5221305421.

The square root of 1245031225 is 35285.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 419963049 + 825068176 = 20493^2 + 28724^2 .

It is not a de Polignac number, because 1245031225 - 2⁷ = 1245031097 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 1245031225.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 172897 + ... + 179953.

Almost surely, 2^1245031225 is an apocalyptic number.

1245031225 is the 35285-th square number.

1245031225 is the 17643-rd centered octagonal number.

It is an amenable number.

1245031225 is a deficient number, since it is larger than the sum of its proper divisors (299026292).

1245031225 is an frugal number, since it uses more digits than its factorization.

1245031225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14124 (or 7062 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The cubic root of 1245031225 is about 1075.7881294561.

Multiplying 1245031225 by its sum of digits (25), we get a square (31125780625 = 176425²).

1245031225 divided by its sum of digits (25) gives a square (49801249 = 7057²).

Adding to 1245031225 its reverse (5221305421), we get a palindrome (6466336646).

The spelling of 1245031225 in words is "one billion, two hundred forty-five million, thirty-one thousand, two hundred twenty-five".