1591316 has 6 divisors (see below), whose sum is σ = 2784810. Its totient is φ = 795656.

The previous prime is 1591313. The next prime is 1591339. The reversal of 1591316 is 6131951.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 198916 = 1180^2 + 446^2 .

It is a super-2 number, since 2×1591316² = 5064573223712, which contains 22 as substring.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1591313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198911 + ... + 198918.

It is an arithmetic number, because the mean of its divisors is an integer number (464135).

2^1591316 is an apocalyptic number.

It is an amenable number.

1591316 is a deficient number, since it is larger than the sum of its proper divisors (1193494).

1591316 is a wasteful number, since it uses less digits than its factorization.

1591316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397833 (or 397831 counting only the distinct ones).

The product of its digits is 810, while the sum is 26.

The square root of 1591316 is about 1261.4737413042. The cubic root of 1591316 is about 116.7487241308.

The spelling of 1591316 in words is "one million, five hundred ninety-one thousand, three hundred sixteen".