1085851191 has 8 divisors (see below), whose sum is σ = 1448224624. Its totient is φ = 723689280.

The previous prime is 1085851187. The next prime is 1085851211. The reversal of 1085851191 is 1911585801.

It is a happy number.

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

It is not a de Polignac number, because 1085851191 - 2² = 1085851187 is a prime.

It is a super-2 number, since 2×1085851191² = 2358145617992236962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085851171) 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, 40486 + ... + 61731.

It is an arithmetic number, because the mean of its divisors is an integer number (181028078).

Almost surely, 2^1085851191 is an apocalyptic number.

1085851191 is a deficient number, since it is larger than the sum of its proper divisors (362373433).

1085851191 is a wasteful number, since it uses less digits than its factorization.

1085851191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105761.

The product of its (nonzero) digits is 14400, while the sum is 39.

The square root of 1085851191 is about 32952.2562353475. The cubic root of 1085851191 is about 1027.8350830214.

The spelling of 1085851191 in words is "one billion, eighty-five million, eight hundred fifty-one thousand, one hundred ninety-one".