1395891 has 12 divisors (see below), whose sum is σ = 2304432. Its totient is φ = 797616.

The previous prime is 1395883. The next prime is 1395907. The reversal of 1395891 is 1985931.

It is a happy number.

It is not a de Polignac number, because 1395891 - 2³ = 1395883 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1395871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11016 + ... + 11141.

It is an arithmetic number, because the mean of its divisors is an integer number (192036).

2^1395891 is an apocalyptic number.

1395891 is a deficient number, since it is larger than the sum of its proper divisors (908541).

1395891 is a wasteful number, since it uses less digits than its factorization.

1395891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22170 (or 22167 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 1395891 is about 1181.4783112694. The cubic root of 1395891 is about 111.7593418913.

The spelling of 1395891 in words is "one million, three hundred ninety-five thousand, eight hundred ninety-one".