1312099 has 4 divisors (see below), whose sum is σ = 1340064. Its totient is φ = 1284136.

The previous prime is 1312093. The next prime is 1312133. The reversal of 1312099 is 9902131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9902131 = 67 ⋅147793.

It is a cyclic number.

It is not a de Polignac number, because 1312099 - 2⁷ = 1311971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13912 + ... + 14005.

It is an arithmetic number, because the mean of its divisors is an integer number (335016).

2^1312099 is an apocalyptic number.

1312099 is a deficient number, since it is larger than the sum of its proper divisors (27965).

1312099 is an equidigital number, since it uses as much as digits as its factorization.

1312099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27964.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1312099 is about 1145.4688996215. The cubic root of 1312099 is about 109.4768269667.

The spelling of 1312099 in words is "one million, three hundred twelve thousand, ninety-nine".