1305502225 has 24 divisors (see below), whose sum is σ = 1674194432. Its totient is φ = 1008806400.

The previous prime is 1305502223. The next prime is 1305502229. The reversal of 1305502225 is 5222055031.

It is a happy number.

It is not a de Polignac number, because 1305502225 - 2¹ = 1305502223 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1305502225.

It is not an unprimeable number, because it can be changed into a prime (1305502223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 520324 + ... + 522826.

Almost surely, 2^1305502225 is an apocalyptic number.

It is an amenable number.

1305502225 is a deficient number, since it is larger than the sum of its proper divisors (368692207).

1305502225 is a wasteful number, since it uses less digits than its factorization.

1305502225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217 (or 3212 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 1305502225 is about 36131.7343204004. The cubic root of 1305502225 is about 1092.9304822738.

Adding to 1305502225 its reverse (5222055031), we get a palindrome (6527557256).

The spelling of 1305502225 in words is "one billion, three hundred five million, five hundred two thousand, two hundred twenty-five".