1186542 has 64 divisors (see below), whose sum is σ = 3125760. Its totient is φ = 326592.

The previous prime is 1186541. The next prime is 1186573. The reversal of 1186542 is 2456811.

1186542 is a `hidden beast` number, since 1 + 1 + 8 + 654 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (1920) is a multiple of the sum of its prime divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1186541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16218 + ... + 16290.

It is an arithmetic number, because the mean of its divisors is an integer number (48840).

2^1186542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1186542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1562880).

1186542 is an abundant number, since it is smaller than the sum of its proper divisors (1939218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1186542 is a wasteful number, since it uses less digits than its factorization.

1186542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 128 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1186542 is about 1089.2850866509. The cubic root of 1186542 is about 105.8671053207.

It can be divided in two parts, 1186 and 542, that added together give a cube (1728 = 12³).

The spelling of 1186542 in words is "one million, one hundred eighty-six thousand, five hundred forty-two".