1187891282 has 6 divisors (see below), whose sum is σ = 1781910039. Its totient is φ = 593921270.

The previous prime is 1187891219. The next prime is 1187891291. The reversal of 1187891282 is 2821987811.

It can be written as a sum of positive squares in only one way, i.e., 593945641 + 593945641 = 24371^2 + 24371^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=24371.

It is a super-3 number, since 3×1187891282³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 36557 + ... + 60927.

Almost surely, 2^1187891282 is an apocalyptic number.

1187891282 is a deficient number, since it is larger than the sum of its proper divisors (594018757).

1187891282 is an frugal number, since it uses more digits than its factorization.

1187891282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48744 (or 24373 counting only the distinct ones).

The product of its digits is 129024, while the sum is 47.

The square root of 1187891282 is about 34465.7987285947. The cubic root of 1187891282 is about 1059.0721921703.

The spelling of 1187891282 in words is "one billion, one hundred eighty-seven million, eight hundred ninety-one thousand, two hundred eighty-two".