1591396 has 6 divisors (see below), whose sum is σ = 2784950. Its totient is φ = 795696.

The previous prime is 1591391. The next prime is 1591397. The reversal of 1591396 is 6931951.

It can be written as a sum of positive squares in only one way, i.e., 1081600 + 509796 = 1040^2 + 714^2 .

It is not an unprimeable number, because it can be changed into a prime (1591391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198921 + ... + 198928.

2^1591396 is an apocalyptic number.

It is an amenable number.

1591396 is a deficient number, since it is larger than the sum of its proper divisors (1193554).

1591396 is a wasteful number, since it uses less digits than its factorization.

1591396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397853 (or 397851 counting only the distinct ones).

The product of its digits is 7290, while the sum is 34.

The square root of 1591396 is about 1261.5054498495. The cubic root of 1591396 is about 116.7506805286.

It can be divided in two parts, 1591 and 396, that multiplied together give a palindrome (630036).

The spelling of 1591396 in words is "one million, five hundred ninety-one thousand, three hundred ninety-six".