1206645 has 32 divisors (see below), whose sum is σ = 2156544. Its totient is φ = 571200.

The previous prime is 1206637. The next prime is 1206679. The reversal of 1206645 is 5466021.

It is not a de Polignac number, because 1206645 - 2³ = 1206637 is a prime.

It is a Curzon number.

1206645 is a lucky number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 11664 + ... + 11766.

It is an arithmetic number, because the mean of its divisors is an integer number (67392).

2^1206645 is an apocalyptic number.

1206645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1206645 is a deficient number, since it is larger than the sum of its proper divisors (949899).

1206645 is a wasteful number, since it uses less digits than its factorization.

1206645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1206645 is about 1098.4739414297. The cubic root of 1206645 is about 106.4616450304.

The spelling of 1206645 in words is "one million, two hundred six thousand, six hundred forty-five".