1531125 has 24 divisors (see below), whose sum is σ = 2762136. Its totient is φ = 816000.

The previous prime is 1531111. The next prime is 1531129. The reversal of 1531125 is 5211351.

It can be written as a sum of positive squares in 4 ways, for example, as 224676 + 1306449 = 474^2 + 1143^2 .

It is not a de Polignac number, because 1531125 - 2⁵ = 1531093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1531098 and 1531107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531129) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 445 + ... + 1805.

It is an arithmetic number, because the mean of its divisors is an integer number (115089).

2^1531125 is an apocalyptic number.

1531125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1531125 is a deficient number, since it is larger than the sum of its proper divisors (1231011).

1531125 is a wasteful number, since it uses less digits than its factorization.

1531125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382 (or 1369 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 1531125 is about 1237.3863584184. The cubic root of 1531125 is about 115.2577708649.

Adding to 1531125 its reverse (5211351), we get a palindrome (6742476).

The spelling of 1531125 in words is "one million, five hundred thirty-one thousand, one hundred twenty-five".