1265279052 has 24 divisors (see below), whose sum is σ = 2968634032. Its totient is φ = 419428800.

The previous prime is 1265279039. The next prime is 1265279069. The reversal of 1265279052 is 2509725621.

It is a self number, because there is not a number n which added to its sum of digits gives 1265279052.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289099 + ... + 293442.

Almost surely, 2^1265279052 is an apocalyptic number.

1265279052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1265279052 is an abundant number, since it is smaller than the sum of its proper divisors (1703354980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265279052 is a wasteful number, since it uses less digits than its factorization.

1265279052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582729 (or 582727 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1265279052 is about 35570.7611951164. The cubic root of 1265279052 is about 1081.5886120373.

The spelling of 1265279052 in words is "one billion, two hundred sixty-five million, two hundred seventy-nine thousand, fifty-two".