1264216225 has 6 divisors (see below), whose sum is σ = 1567628150. Its totient is φ = 1011372960.

The previous prime is 1264216207. The next prime is 1264216231. The reversal of 1264216225 is 5226124621.

It can be written as a sum of positive squares in 3 ways, for example, as 41525136 + 1222691089 = 6444^2 + 34967^2 .

It is not a de Polignac number, because 1264216225 - 2⁵ = 1264216193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25284300 + ... + 25284349.

Almost surely, 2^1264216225 is an apocalyptic number.

It is an amenable number.

1264216225 is a deficient number, since it is larger than the sum of its proper divisors (303411925).

1264216225 is an equidigital number, since it uses as much as digits as its factorization.

1264216225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50568659 (or 50568654 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 1264216225 is about 35555.8184408684. The cubic root of 1264216225 is about 1081.2856845006.

The spelling of 1264216225 in words is "one billion, two hundred sixty-four million, two hundred sixteen thousand, two hundred twenty-five".