1311698 has 4 divisors (see below), whose sum is σ = 1967550. Its totient is φ = 655848.

The previous prime is 1311691. The next prime is 1311701. The reversal of 1311698 is 8961131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1247689 + 64009 = 1117^2 + 253^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1311698.

It is not an unprimeable number, because it can be changed into a prime (1311691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327923 + ... + 327926.

2^1311698 is an apocalyptic number.

1311698 is a deficient number, since it is larger than the sum of its proper divisors (655852).

1311698 is an equidigital number, since it uses as much as digits as its factorization.

1311698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655851.

The product of its digits is 1296, while the sum is 29.

The square root of 1311698 is about 1145.2938487567. The cubic root of 1311698 is about 109.4656731638.

It can be divided in two parts, 13 and 11698, that added together give a palindrome (11711).

The spelling of 1311698 in words is "one million, three hundred eleven thousand, six hundred ninety-eight".