1265551552 has 28 divisors (see below), whose sum is σ = 2579207440. Its totient is φ = 615672576.

The previous prime is 1265551549. The next prime is 1265551577. The reversal of 1265551552 is 2551555621.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264852 + ... + 269587.

Almost surely, 2^1265551552 is an apocalyptic number.

It is an amenable number.

1265551552 is an abundant number, since it is smaller than the sum of its proper divisors (1313655888).

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

1265551552 is an equidigital number, since it uses as much as digits as its factorization.

1265551552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534488 (or 534478 counting only the distinct ones).

The product of its digits is 75000, while the sum is 37.

The square root of 1265551552 is about 35574.5913820524. The cubic root of 1265551552 is about 1081.6662528129. Note that the first 3 decimals are identical.

The spelling of 1265551552 in words is "one billion, two hundred sixty-five million, five hundred fifty-one thousand, five hundred fifty-two".