1206431 has 4 divisors (see below), whose sum is σ = 1209000. Its totient is φ = 1203864.

The previous prime is 1206407. The next prime is 1206433. The reversal of 1206431 is 1346021.

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

It is a cyclic number.

It is not a de Polignac number, because 1206431 - 2¹⁴ = 1190047 is a prime.

It is a super-2 number, since 2×1206431² = 2910951515522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356 + ... + 1593.

It is an arithmetic number, because the mean of its divisors is an integer number (302250).

2^1206431 is an apocalyptic number.

1206431 is a deficient number, since it is larger than the sum of its proper divisors (2569).

1206431 is an equidigital number, since it uses as much as digits as its factorization.

1206431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1206431 is about 1098.3765292467. The cubic root of 1206431 is about 106.4553509563.

The spelling of 1206431 in words is "one million, two hundred six thousand, four hundred thirty-one".