1313661 has 8 divisors (see below), whose sum is σ = 1758400. Its totient is φ = 872352.

The previous prime is 1313657. The next prime is 1313677. The reversal of 1313661 is 1663131.

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

It is not a de Polignac number, because 1313661 - 2² = 1313657 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 (1313621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240 + ... + 1638.

It is an arithmetic number, because the mean of its divisors is an integer number (219800).

2^1313661 is an apocalyptic number.

It is an amenable number.

1313661 is a deficient number, since it is larger than the sum of its proper divisors (444739).

1313661 is a wasteful number, since it uses less digits than its factorization.

1313661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715.

The product of its digits is 324, while the sum is 21.

The square root of 1313661 is about 1146.1505136761. The cubic root of 1313661 is about 109.5202522954.

Adding to 1313661 its reverse (1663131), we get a palindrome (2976792).

The spelling of 1313661 in words is "one million, three hundred thirteen thousand, six hundred sixty-one".