1206651 has 8 divisors (see below), whose sum is σ = 1639440. Its totient is φ = 789152.

The previous prime is 1206637. The next prime is 1206679. The reversal of 1206651 is 1566021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1206651 - 2⁵ = 1206619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1206691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3636 + ... + 3953.

It is an arithmetic number, because the mean of its divisors is an integer number (204930).

2^1206651 is an apocalyptic number.

1206651 is a deficient number, since it is larger than the sum of its proper divisors (432789).

1206651 is an equidigital number, since it uses as much as digits as its factorization.

1206651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7645.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1206651 is about 1098.4766724879. The cubic root of 1206651 is about 106.4618214891.

The spelling of 1206651 in words is "one million, two hundred six thousand, six hundred fifty-one".