1200920806 has 4 divisors (see below), whose sum is σ = 1801381212. Its totient is φ = 600460402.

The previous prime is 1200920801. The next prime is 1200920807. The reversal of 1200920806 is 6080290021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6080290021 = 13 ⋅467714617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200920801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300230200 + ... + 300230203.

It is an arithmetic number, because the mean of its divisors is an integer number (450345303).

Almost surely, 2^1200920806 is an apocalyptic number.

1200920806 is a deficient number, since it is larger than the sum of its proper divisors (600460406).

1200920806 is an equidigital number, since it uses as much as digits as its factorization.

1200920806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600460405.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1200920806 is about 34654.3042925406. The cubic root of 1200920806 is about 1062.9303059082.

The spelling of 1200920806 in words is "one billion, two hundred million, nine hundred twenty thousand, eight hundred six".