1312341661 has 8 divisors (see below), whose sum is σ = 1362983040. Its totient is φ = 1262647008.

The previous prime is 1312341629. The next prime is 1312341671. The reversal of 1312341661 is 1661432131.

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 1312341661 - 2⁵ = 1312341629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312341671) 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, 233856 + ... + 239401.

It is an arithmetic number, because the mean of its divisors is an integer number (170372880).

Almost surely, 2^1312341661 is an apocalyptic number.

It is an amenable number.

1312341661 is a deficient number, since it is larger than the sum of its proper divisors (50641379).

1312341661 is an equidigital number, since it uses as much as digits as its factorization.

1312341661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473363.

The product of its digits is 2592, while the sum is 28.

The square root of 1312341661 is about 36226.2565137498. The cubic root of 1312341661 is about 1094.8357547136.

Adding to 1312341661 its reverse (1661432131), we get a palindrome (2973773792).

The spelling of 1312341661 in words is "one billion, three hundred twelve million, three hundred forty-one thousand, six hundred sixty-one".