1391906 has 8 divisors (see below), whose sum is σ = 2093904. Its totient is φ = 693940.

The previous prime is 1391899. The next prime is 1391917. The reversal of 1391906 is 6091931.

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

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, 101 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (261738).

2^1391906 is an apocalyptic number.

1391906 is a deficient number, since it is larger than the sum of its proper divisors (701998).

1391906 is a wasteful number, since it uses less digits than its factorization.

1391906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2016.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1391906 is about 1179.7906593968. The cubic root of 1391906 is about 111.6528900605.

It can be divided in two parts, 13 and 91906, that added together give a palindrome (91919).

The spelling of 1391906 in words is "one million, three hundred ninety-one thousand, nine hundred six".