1591125 has 16 divisors (see below), whose sum is σ = 2648256. Its totient is φ = 848400.

The previous prime is 1591103. The next prime is 1591127. The reversal of 1591125 is 5211951.

It is not a de Polignac number, because 1591125 - 2¹⁰ = 1590101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1591095 and 1591104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1591127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1747 + ... + 2496.

It is an arithmetic number, because the mean of its divisors is an integer number (165516).

2^1591125 is an apocalyptic number.

1591125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1591125 is a deficient number, since it is larger than the sum of its proper divisors (1057131).

1591125 is an equidigital number, since it uses as much as digits as its factorization.

1591125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4261 (or 4251 counting only the distinct ones).

The product of its digits is 450, while the sum is 24.

The square root of 1591125 is about 1261.3980339290. The cubic root of 1591125 is about 116.7440529658.

The spelling of 1591125 in words is "one million, five hundred ninety-one thousand, one hundred twenty-five".