1312121 has 8 divisors (see below), whose sum is σ = 1408320. Its totient is φ = 1218672.

The previous prime is 1312093. The next prime is 1312133. The reversal of 1312121 is 1212131.

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 1312121 - 2¹⁰ = 1311097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312921) 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, 356 + ... + 1658.

It is an arithmetic number, because the mean of its divisors is an integer number (176040).

2^1312121 is an apocalyptic number.

It is an amenable number.

1312121 is a deficient number, since it is larger than the sum of its proper divisors (96199).

1312121 is a wasteful number, since it uses less digits than its factorization.

1312121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375.

The product of its digits is 12, while the sum is 11.

The square root of 1312121 is about 1145.4785026355. The cubic root of 1312121 is about 109.4774388302.

Adding to 1312121 its reverse (1212131), we get a palindrome (2524252).

The spelling of 1312121 in words is "one million, three hundred twelve thousand, one hundred twenty-one".