1225512245 has 4 divisors (see below), whose sum is σ = 1470614700. Its totient is φ = 980409792.

The previous prime is 1225512203. The next prime is 1225512257. The reversal of 1225512245 is 5422155221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 629859409 + 595652836 = 25097^2 + 24406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225512245 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122551220 + ... + 122551229.

It is an arithmetic number, because the mean of its divisors is an integer number (367653675).

Almost surely, 2^1225512245 is an apocalyptic number.

It is an amenable number.

1225512245 is a deficient number, since it is larger than the sum of its proper divisors (245102455).

1225512245 is an equidigital number, since it uses as much as digits as its factorization.

1225512245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245102454.

The product of its digits is 8000, while the sum is 29.

The square root of 1225512245 is about 35007.3170208744. The cubic root of 1225512245 is about 1070.1366014787.

Adding to 1225512245 its reverse (5422155221), we get a palindrome (6647667466).

The spelling of 1225512245 in words is "one billion, two hundred twenty-five million, five hundred twelve thousand, two hundred forty-five".