1206491 has 18 divisors (see below), whose sum is σ = 1460340. Its totient is φ = 995280.

The previous prime is 1206479. The next prime is 1206497. The reversal of 1206491 is 1946021.

It is a happy number.

It is not a de Polignac number, because 1206491 - 2¹⁰ = 1205467 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1206497) 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 17 ways as a sum of consecutive naturals, for example, 20420 + ... + 20478.

It is an arithmetic number, because the mean of its divisors is an integer number (81130).

2^1206491 is an apocalyptic number.

1206491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1206491 is a deficient number, since it is larger than the sum of its proper divisors (253849).

1206491 is a wasteful number, since it uses less digits than its factorization.

1206491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1206491 is about 1098.4038419452. The cubic root of 1206491 is about 106.4571157251.

The spelling of 1206491 in words is "one million, two hundred six thousand, four hundred ninety-one".