1591131 has 8 divisors (see below), whose sum is σ = 2134080. Its totient is φ = 1054472.

The previous prime is 1591127. The next prime is 1591141. The reversal of 1591131 is 1311951.

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

It is a cyclic number.

It is not a de Polignac number, because 1591131 - 2² = 1591127 is a prime.

It is a super-2 number, since 2×1591131² = 5063395718322, which contains 22 as substring.

1591131 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1591098 and 1591107.

It is not an unprimeable number, because it can be changed into a prime (1591141) 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 7 ways as a sum of consecutive naturals, for example, 945 + ... + 2018.

It is an arithmetic number, because the mean of its divisors is an integer number (266760).

2^1591131 is an apocalyptic number.

1591131 is a deficient number, since it is larger than the sum of its proper divisors (542949).

1591131 is a wasteful number, since it uses less digits than its factorization.

1591131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145.

The product of its digits is 135, while the sum is 21.

The square root of 1591131 is about 1261.4004122403. The cubic root of 1591131 is about 116.7441997097.

The spelling of 1591131 in words is "one million, five hundred ninety-one thousand, one hundred thirty-one".