1186406 has 8 divisors (see below), whose sum is σ = 1916544. Its totient is φ = 547560.

The previous prime is 1186403. The next prime is 1186411. The reversal of 1186406 is 6046811.

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

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 45631 = 1186406 / (1 + 1 + 8 + 6 + 4 + 0 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1186403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22790 + ... + 22841.

It is an arithmetic number, because the mean of its divisors is an integer number (239568).

2^1186406 is an apocalyptic number.

1186406 is a deficient number, since it is larger than the sum of its proper divisors (730138).

1186406 is a wasteful number, since it uses less digits than its factorization.

1186406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45646.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1186406 is about 1089.2226585965. Note that the first 3 decimals coincide. The cubic root of 1186406 is about 105.8630603799.

The spelling of 1186406 in words is "one million, one hundred eighty-six thousand, four hundred six".