1281284552 has 48 divisors (see below), whose sum is σ = 2522774940. Its totient is φ = 610017408.

The previous prime is 1281284503. The next prime is 1281284561. The reversal of 1281284552 is 2554821821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1251319876 + 29964676 = 35374^2 + 5474^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1171718 + ... + 1172810.

Almost surely, 2^1281284552 is an apocalyptic number.

It is an amenable number.

1281284552 is a deficient number, since it is larger than the sum of its proper divisors (1241490388).

1281284552 is a wasteful number, since it uses less digits than its factorization.

1281284552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 1395 counting only the distinct ones).

The product of its digits is 51200, while the sum is 38.

The square root of 1281284552 is about 35795.0352982086. The cubic root of 1281284552 is about 1086.1301346405.

The spelling of 1281284552 in words is "one billion, two hundred eighty-one million, two hundred eighty-four thousand, five hundred fifty-two".