1331012539 has 2 divisors, whose sum is σ = 1331012540. Its totient is φ = 1331012538.

The previous prime is 1331012519. The next prime is 1331012587. The reversal of 1331012539 is 9352101331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331012539 - 2¹¹ = 1331010491 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331012519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665506269 + 665506270.

It is an arithmetic number, because the mean of its divisors is an integer number (665506270).

Almost surely, 2^1331012539 is an apocalyptic number.

1331012539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331012539 is an equidigital number, since it uses as much as digits as its factorization.

1331012539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 1331012539 is about 36483.0445412660. The cubic root of 1331012539 is about 1100.0034542591.

The spelling of 1331012539 in words is "one billion, three hundred thirty-one million, twelve thousand, five hundred thirty-nine".