1331530 has 8 divisors (see below), whose sum is σ = 2396772. Its totient is φ = 532608.

The previous prime is 1331527. The next prime is 1331549. The reversal of 1331530 is 351331.

It can be written as a sum of positive squares in 2 ways, for example, as 1216609 + 114921 = 1103^2 + 339^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66567 + ... + 66586.

2^1331530 is an apocalyptic number.

1331530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1331530 is a deficient number, since it is larger than the sum of its proper divisors (1065242).

1331530 is a wasteful number, since it uses less digits than its factorization.

1331530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133160.

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

The square root of 1331530 is about 1153.9194079311. The cubic root of 1331530 is about 110.0145986134.

Adding to 1331530 its reverse (351331), we get a palindrome (1682861).

The spelling of 1331530 in words is "one million, three hundred thirty-one thousand, five hundred thirty".