1265666224 has 10 divisors (see below), whose sum is σ = 2452228340. Its totient is φ = 632833104.

The previous prime is 1265666221. The next prime is 1265666239. The reversal of 1265666224 is 4226665621.

It is not an unprimeable number, because it can be changed into a prime (1265666221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39552054 + ... + 39552085.

It is an arithmetic number, because the mean of its divisors is an integer number (245222834).

Almost surely, 2^1265666224 is an apocalyptic number.

It is an amenable number.

1265666224 is a deficient number, since it is larger than the sum of its proper divisors (1186562116).

1265666224 is an equidigital number, since it uses as much as digits as its factorization.

1265666224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79104147 (or 79104141 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 1265666224 is about 35576.2030576620. The cubic root of 1265666224 is about 1081.6989218591.

It can be divided in two parts, 1265 and 666224, that added together give a square (667489 = 817²).

The spelling of 1265666224 in words is "one billion, two hundred sixty-five million, six hundred sixty-six thousand, two hundred twenty-four".