1206635 has 4 divisors (see below), whose sum is σ = 1447968. Its totient is φ = 965304.

The previous prime is 1206619. The next prime is 1206637. The reversal of 1206635 is 5366021.

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 1206635 - 2⁴ = 1206619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206635.

It is not an unprimeable number, because it can be changed into a prime (1206637) 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, 120659 + ... + 120668.

It is an arithmetic number, because the mean of its divisors is an integer number (361992).

2^1206635 is an apocalyptic number.

1206635 is a deficient number, since it is larger than the sum of its proper divisors (241333).

1206635 is an equidigital number, since it uses as much as digits as its factorization.

1206635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241332.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1206635 is about 1098.4693896509. The cubic root of 1206635 is about 106.4613509314.

The spelling of 1206635 in words is "one million, two hundred six thousand, six hundred thirty-five".