1187871 has 8 divisors (see below), whose sum is σ = 1593984. Its totient is φ = 786840.

The previous prime is 1187867. The next prime is 1187873. The reversal of 1187871 is 1787811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1187871 - 2² = 1187867 is a prime.

It is a super-2 number, since 2×1187871² = 2822075025282, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685 + ... + 1686.

It is an arithmetic number, because the mean of its divisors is an integer number (199248).

2^1187871 is an apocalyptic number.

1187871 is a deficient number, since it is larger than the sum of its proper divisors (406113).

1187871 is a wasteful number, since it uses less digits than its factorization.

1187871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541.

The product of its digits is 3136, while the sum is 33.

The square root of 1187871 is about 1089.8949490662. The cubic root of 1187871 is about 105.9066164620.

The spelling of 1187871 in words is "one million, one hundred eighty-seven thousand, eight hundred seventy-one".