1265279652 has 72 divisors (see below), whose sum is σ = 3936435776. Its totient is φ = 333699264.

The previous prime is 1265279647. The next prime is 1265279671. The reversal of 1265279652 is 2569725621.

It is a super-2 number, since 2×1265279652² = 3201865195530482208, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1265279598 and 1265279607.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189838 + ... + 196389.

Almost surely, 2^1265279652 is an apocalyptic number.

1265279652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1265279652 is an abundant number, since it is smaller than the sum of its proper divisors (2671156124).

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

1265279652 is a wasteful number, since it uses less digits than its factorization.

1265279652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386257 (or 386252 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 1265279652 is about 35570.7696290086. The cubic root of 1265279652 is about 1081.5887830017.

The spelling of 1265279652 in words is "one billion, two hundred sixty-five million, two hundred seventy-nine thousand, six hundred fifty-two".