1311206 has 32 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 556416.

The previous prime is 1311181. The next prime is 1311217. The reversal of 1311206 is 6021131.

It is a super-2 number, since 2×1311206² = 3438522348872, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27875 + ... + 27921.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2^1311206 is an apocalyptic number.

1311206 is a deficient number, since it is larger than the sum of its proper divisors (987034).

1311206 is a wasteful number, since it uses less digits than its factorization.

1311206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1311206 is about 1145.0790365735. The cubic root of 1311206 is about 109.4519850928.

Adding to 1311206 its reverse (6021131), we get a palindrome (7332337).

The spelling of 1311206 in words is "one million, three hundred eleven thousand, two hundred six".