1187841 has 8 divisors (see below), whose sum is σ = 1677024. Its totient is φ = 745280.

The previous prime is 1187839. The next prime is 1187863. The reversal of 1187841 is 1487811.

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

It is not a de Polignac number, because 1187841 - 2¹ = 1187839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1187799 and 1187808.

It is not an unprimeable number, because it can be changed into a prime (1187801) 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, 11595 + ... + 11696.

It is an arithmetic number, because the mean of its divisors is an integer number (209628).

It is a Proth number, since it is equal to 145 ⋅ 2¹³ + 1 and 145 < 2¹³.

2^1187841 is an apocalyptic number.

It is an amenable number.

1187841 is a deficient number, since it is larger than the sum of its proper divisors (489183).

1187841 is a wasteful number, since it uses less digits than its factorization.

1187841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23311.

The product of its digits is 1792, while the sum is 30.

The square root of 1187841 is about 1089.8811861850. The cubic root of 1187841 is about 105.9057248878.

Subtracting from 1187841 its sum of digits (30), we obtain a palindrome (1187811).

The spelling of 1187841 in words is "one million, one hundred eighty-seven thousand, eight hundred forty-one".