1330531 has 4 divisors (see below), whose sum is σ = 1338064. Its totient is φ = 1323000.

The previous prime is 1330529. The next prime is 1330541. The reversal of 1330531 is 1350331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1330531 - 2¹ = 1330529 is a prime.

It is a super-3 number, since 3×1330531³ = 7066367948622333873, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

1330531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1330501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3495 + ... + 3856.

It is an arithmetic number, because the mean of its divisors is an integer number (334516).

2^1330531 is an apocalyptic number.

1330531 is a deficient number, since it is larger than the sum of its proper divisors (7533).

1330531 is an equidigital number, since it uses as much as digits as its factorization.

1330531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7532.

The product of its (nonzero) digits is 135, while the sum is 16.

The square root of 1330531 is about 1153.4864541901. The cubic root of 1330531 is about 109.9870783720.

Adding to 1330531 its reverse (1350331), we get a palindrome (2680862).

The spelling of 1330531 in words is "one million, three hundred thirty thousand, five hundred thirty-one".