1331523 has 12 divisors (see below), whose sum is σ = 1935648. Its totient is φ = 882000.

The previous prime is 1331521. The next prime is 1331527. The reversal of 1331523 is 3251331.

It is not a de Polignac number, because 1331523 - 2¹ = 1331521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1331496 and 1331505.

It is not an unprimeable number, because it can be changed into a prime (1331521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1398 + ... + 2148.

It is an arithmetic number, because the mean of its divisors is an integer number (161304).

2^1331523 is an apocalyptic number.

1331523 is a deficient number, since it is larger than the sum of its proper divisors (604125).

1331523 is a wasteful number, since it uses less digits than its factorization.

1331523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954 (or 951 counting only the distinct ones).

The product of its digits is 270, while the sum is 18.

The square root of 1331523 is about 1153.9163747863. The cubic root of 1331523 is about 110.0144058268.

Adding to 1331523 its reverse (3251331), we get a palindrome (4582854).

The spelling of 1331523 in words is "one million, three hundred thirty-one thousand, five hundred twenty-three".