1188406 has 4 divisors (see below), whose sum is σ = 1782612. Its totient is φ = 594202.

The previous prime is 1188389. The next prime is 1188409. The reversal of 1188406 is 6048811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6048811 = 661 ⋅9151.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 297100 + ... + 297103.

It is an arithmetic number, because the mean of its divisors is an integer number (445653).

2^1188406 is an apocalyptic number.

1188406 is a deficient number, since it is larger than the sum of its proper divisors (594206).

1188406 is an equidigital number, since it uses as much as digits as its factorization.

1188406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594205.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1188406 is about 1090.1403579356. The cubic root of 1188406 is about 105.9225136808.

The spelling of 1188406 in words is "one million, one hundred eighty-eight thousand, four hundred six".