1531325 has 6 divisors (see below), whose sum is σ = 1898874. Its totient is φ = 1225040.

The previous prime is 1531303. The next prime is 1531331. The reversal of 1531325 is 5231351.

It can be written as a sum of positive squares in 3 ways, for example, as 1156 + 1530169 = 34^2 + 1237^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1531325 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1531297 and 1531306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30602 + ... + 30651.

It is an arithmetic number, because the mean of its divisors is an integer number (316479).

2^1531325 is an apocalyptic number.

It is an amenable number.

1531325 is a deficient number, since it is larger than the sum of its proper divisors (367549).

1531325 is an equidigital number, since it uses as much as digits as its factorization.

1531325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61263 (or 61258 counting only the distinct ones).

The product of its digits is 450, while the sum is 20.

The square root of 1531325 is about 1237.4671712817. The cubic root of 1531325 is about 115.2627890815.

Adding to 1531325 its reverse (5231351), we get a palindrome (6762676).

The spelling of 1531325 in words is "one million, five hundred thirty-one thousand, three hundred twenty-five".