1591040 has 72 divisors (see below), whose sum is σ = 4194288. Its totient is φ = 573440.

The previous prime is 1591033. The next prime is 1591097. The reversal of 1591040 is 401951.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a nialpdrome in base 11.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14024 + ... + 14136.

It is an arithmetic number, because the mean of its divisors is an integer number (58254).

2^1591040 is an apocalyptic number.

1591040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1591040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2097144).

1591040 is an abundant number, since it is smaller than the sum of its proper divisors (2603248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1591040 is a wasteful number, since it uses less digits than its factorization.

1591040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 131 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1591040 is about 1261.3643407041. The cubic root of 1591040 is about 116.7419740550.

Adding to 1591040 its reverse (401951), we get a palindrome (1992991).

The spelling of 1591040 in words is "one million, five hundred ninety-one thousand, forty".