1187147 has 8 divisors (see below), whose sum is σ = 1303344. Its totient is φ = 1074528.

The previous prime is 1187141. The next prime is 1187159. The reversal of 1187147 is 7417811.

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

It is not a de Polignac number, because 1187147 - 2²⁰ = 138571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1187141) 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, 173 + ... + 1550.

It is an arithmetic number, because the mean of its divisors is an integer number (162918).

2^1187147 is an apocalyptic number.

1187147 is a deficient number, since it is larger than the sum of its proper divisors (116197).

1187147 is a wasteful number, since it uses less digits than its factorization.

1187147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789.

The product of its digits is 1568, while the sum is 29.

The square root of 1187147 is about 1089.5627563385. The cubic root of 1187147 is about 105.8850956140.

The spelling of 1187147 in words is "one million, one hundred eighty-seven thousand, one hundred forty-seven".