1161440206 has 8 divisors (see below), whose sum is σ = 1742307624. Its totient is φ = 580671000.

The previous prime is 1161440201. The next prime is 1161440209. The reversal of 1161440206 is 6020441611.

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

It is a super-2 number, since 2×1161440206² = 2697886704226644872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161440201) 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, 25081 + ... + 54331.

It is an arithmetic number, because the mean of its divisors is an integer number (217788453).

Almost surely, 2^1161440206 is an apocalyptic number.

1161440206 is a deficient number, since it is larger than the sum of its proper divisors (580867418).

1161440206 is a wasteful number, since it uses less digits than its factorization.

1161440206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49106.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1161440206 is about 34079.9091254657. The cubic root of 1161440206 is about 1051.1522365459.

Adding to 1161440206 its reverse (6020441611), we get a palindrome (7181881817).

The spelling of 1161440206 in words is "one billion, one hundred sixty-one million, four hundred forty thousand, two hundred six".