1393861 has 8 divisors (see below), whose sum is σ = 1603584. Its totient is φ = 1186800.

The previous prime is 1393837. The next prime is 1393871. The reversal of 1393861 is 1683931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1393861 is a prime.

It is an Ulam number.

It is a Duffinian number.

1393861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636 + ... + 1786.

It is an arithmetic number, because the mean of its divisors is an integer number (200448).

2^1393861 is an apocalyptic number.

It is an amenable number.

1393861 is a deficient number, since it is larger than the sum of its proper divisors (209723).

1393861 is a wasteful number, since it uses less digits than its factorization.

1393861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its digits is 3888, while the sum is 31.

The square root of 1393861 is about 1180.6189054898. The cubic root of 1393861 is about 111.7051395860.

The spelling of 1393861 in words is "one million, three hundred ninety-three thousand, eight hundred sixty-one".