1265225217 has 8 divisors (see below), whose sum is σ = 1714622400. Its totient is φ = 829655760.

The previous prime is 1265225201. The next prime is 1265225237. The reversal of 1265225217 is 7125225621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1265225217 - 2⁴ = 1265225201 is a prime.

It is a super-3 number, since 3×1265225217³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1265225237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3456717 + ... + 3457082.

It is an arithmetic number, because the mean of its divisors is an integer number (214327800).

Almost surely, 2^1265225217 is an apocalyptic number.

It is an amenable number.

1265225217 is a deficient number, since it is larger than the sum of its proper divisors (449397183).

1265225217 is an equidigital number, since it uses as much as digits as its factorization.

1265225217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6913863.

The product of its digits is 16800, while the sum is 33.

The square root of 1265225217 is about 35570.0044560020. The cubic root of 1265225217 is about 1081.5732720355.

The spelling of 1265225217 in words is "one billion, two hundred sixty-five million, two hundred twenty-five thousand, two hundred seventeen".