1405986 has 8 divisors (see below), whose sum is σ = 2811984. Its totient is φ = 468660.

The previous prime is 1405979. The next prime is 1405997. The reversal of 1405986 is 6895041.

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

1405986 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117160 + ... + 117171.

It is an arithmetic number, because the mean of its divisors is an integer number (351498).

2^1405986 is an apocalyptic number.

1405986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1405986 is a wasteful number, since it uses less digits than its factorization.

1405986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234336.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1405986 is about 1185.7428051648. The cubic root of 1405986 is about 112.0281073164.

The spelling of 1405986 in words is "one million, four hundred five thousand, nine hundred eighty-six".