861742211 has 18 divisors (see below), whose sum is σ = 963926292. Its totient is φ = 764018320.

The previous prime is 861742199. The next prime is 861742243. The reversal of 861742211 is 112247168.

It is a happy number.

It is not a de Polignac number, because 861742211 - 2¹⁴ = 861725827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861042211) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5160050 + ... + 5160216.

Almost surely, 2^861742211 is an apocalyptic number.

861742211 is a deficient number, since it is larger than the sum of its proper divisors (102184081).

861742211 is an equidigital number, since it uses as much as digits as its factorization.

861742211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 231 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 861742211 is about 29355.4460194356. The cubic root of 861742211 is about 951.6102739889.

Adding to 861742211 its reverse (112247168), we get a palindrome (973989379).

The spelling of 861742211 in words is "eight hundred sixty-one million, seven hundred forty-two thousand, two hundred eleven".