1275172225 has 6 divisors (see below), whose sum is σ = 1581213590. Its totient is φ = 1020137760.

The previous prime is 1275172219. The next prime is 1275172229. The reversal of 1275172225 is 5222715721.

It can be written as a sum of positive squares in 3 ways, for example, as 27952369 + 1247219856 = 5287^2 + 35316^2 .

It is not a de Polignac number, because 1275172225 - 2⁷ = 1275172097 is a prime.

It is a super-2 number, since 2×1275172225² = 3252128406822901250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1275172229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25503420 + ... + 25503469.

Almost surely, 2^1275172225 is an apocalyptic number.

It is an amenable number.

1275172225 is a deficient number, since it is larger than the sum of its proper divisors (306041365).

1275172225 is an equidigital number, since it uses as much as digits as its factorization.

1275172225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51006899 (or 51006894 counting only the distinct ones).

The product of its digits is 19600, while the sum is 34.

The square root of 1275172225 is about 35709.5536936546. The cubic root of 1275172225 is about 1084.4002645909.

Adding to 1275172225 its reverse (5222715721), we get a palindrome (6497887946).

The spelling of 1275172225 in words is "one billion, two hundred seventy-five million, one hundred seventy-two thousand, two hundred twenty-five".