1391854 has 4 divisors (see below), whose sum is σ = 2087784. Its totient is φ = 695926.

The previous prime is 1391849. The next prime is 1391861. The reversal of 1391854 is 4581931.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347962 + ... + 347965.

It is an arithmetic number, because the mean of its divisors is an integer number (521946).

2^1391854 is an apocalyptic number.

1391854 is a deficient number, since it is larger than the sum of its proper divisors (695930).

1391854 is an equidigital number, since it uses as much as digits as its factorization.

1391854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695929.

The product of its digits is 4320, while the sum is 31.

The square root of 1391854 is about 1179.7686213830. The cubic root of 1391854 is about 111.6514996355.

The spelling of 1391854 in words is "one million, three hundred ninety-one thousand, eight hundred fifty-four".