1200770861 has 4 divisors (see below), whose sum is σ = 1201060224. Its totient is φ = 1200481500.

The previous prime is 1200770803. The next prime is 1200770869. The reversal of 1200770861 is 1680770021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1200770861 - 2¹⁰ = 1200769837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200770869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138365 + ... + 146786.

It is an arithmetic number, because the mean of its divisors is an integer number (300265056).

Almost surely, 2^1200770861 is an apocalyptic number.

It is an amenable number.

1200770861 is a deficient number, since it is larger than the sum of its proper divisors (289363).

1200770861 is an equidigital number, since it uses as much as digits as its factorization.

1200770861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289362.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 1200770861 is about 34652.1407852387. The cubic root of 1200770861 is about 1062.8860654894.

The spelling of 1200770861 in words is "one billion, two hundred million, seven hundred seventy thousand, eight hundred sixty-one".