1312042549 has 8 divisors (see below), whose sum is σ = 1382780000. Its totient is φ = 1241473392.

The previous prime is 1312042513. The next prime is 1312042591. The reversal of 1312042549 is 9452402131.

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

It is a cyclic number.

It is not a de Polignac number, because 1312042549 - 2¹⁷ = 1311911477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312042549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312012549) 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, 25899 + ... + 57400.

It is an arithmetic number, because the mean of its divisors is an integer number (172847500).

Almost surely, 2^1312042549 is an apocalyptic number.

1312042549 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1312042549 is a deficient number, since it is larger than the sum of its proper divisors (70737451).

1312042549 is an equidigital number, since it uses as much as digits as its factorization.

1312042549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84147.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1312042549 is about 36222.1278916631. The cubic root of 1312042549 is about 1094.7525692127.

The spelling of 1312042549 in words is "one billion, three hundred twelve million, forty-two thousand, five hundred forty-nine".