1231206 has 8 divisors (see below), whose sum is σ = 2462424. Its totient is φ = 410400.

The previous prime is 1231201. The next prime is 1231207. The reversal of 1231206 is 6021321.

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

1231206 is an admirable number.

It is a Smith number, since the sum of its digits (15) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231201) 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, 102595 + ... + 102606.

It is an arithmetic number, because the mean of its divisors is an integer number (307803).

2^1231206 is an apocalyptic number.

1231206 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231206 is a wasteful number, since it uses less digits than its factorization.

1231206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205206.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1231206 is about 1109.5972242215. The cubic root of 1231206 is about 107.1791333671.

Adding to 1231206 its reverse (6021321), we get a palindrome (7252527).

It can be divided in two parts, 123120 and 6, that multiplied together give a triangular number (738720 = T₁₂₁₅).

The spelling of 1231206 in words is "one million, two hundred thirty-one thousand, two hundred six".