1187248881 has 80 divisors (see below), whose sum is σ = 2057950720. Its totient is φ = 604558080.

The previous prime is 1187248871. The next prime is 1187248889. The reversal of 1187248881 is 1888427811.

It is not a de Polignac number, because 1187248881 - 2¹⁰ = 1187247857 is a prime.

It is a super-2 number, since 2×1187248881² = 2819119810871504322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1187248881.

It is not an unprimeable number, because it can be changed into a prime (1187248889) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2902605 + ... + 2903013.

It is an arithmetic number, because the mean of its divisors is an integer number (25724384).

Almost surely, 2^1187248881 is an apocalyptic number.

It is an amenable number.

1187248881 is a deficient number, since it is larger than the sum of its proper divisors (870701839).

1187248881 is an equidigital number, since it uses as much as digits as its factorization.

1187248881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 463 counting only the distinct ones).

The product of its digits is 229376, while the sum is 48.

The square root of 1187248881 is about 34456.4780701685. The cubic root of 1187248881 is about 1058.8812454833.

The spelling of 1187248881 in words is "one billion, one hundred eighty-seven million, two hundred forty-eight thousand, eight hundred eighty-one".