1531523 has 8 divisors (see below), whose sum is σ = 1764192. Its totient is φ = 1302336.

The previous prime is 1531499. The next prime is 1531549. The reversal of 1531523 is 3251351.

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

It is not a de Polignac number, because 1531523 - 2¹⁶ = 1465987 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1531495 and 1531504.

It is not an unprimeable number, because it can be changed into a prime (1530523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161 + ... + 1757.

It is an arithmetic number, because the mean of its divisors is an integer number (220524).

2^1531523 is an apocalyptic number.

1531523 is a deficient number, since it is larger than the sum of its proper divisors (232669).

1531523 is a wasteful number, since it uses less digits than its factorization.

1531523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741.

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

The square root of 1531523 is about 1237.5471708181. The cubic root of 1531523 is about 115.2677566855.

Adding to 1531523 its reverse (3251351), we get a palindrome (4782874).

The spelling of 1531523 in words is "one million, five hundred thirty-one thousand, five hundred twenty-three".