1085811245 has 8 divisors (see below), whose sum is σ = 1309725816. Its totient is φ = 864147456.

The previous prime is 1085811193. The next prime is 1085811247. The reversal of 1085811245 is 5421185801.

It can be written as a sum of positive squares in 4 ways, for example, as 212372329 + 873438916 = 14573^2 + 29554^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1085811245 - 2²⁸ = 817375789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085811247) 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, 561632 + ... + 563561.

It is an arithmetic number, because the mean of its divisors is an integer number (163715727).

Almost surely, 2^1085811245 is an apocalyptic number.

It is an amenable number.

1085811245 is a deficient number, since it is larger than the sum of its proper divisors (223914571).

1085811245 is a wasteful number, since it uses less digits than its factorization.

1085811245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125391.

The product of its (nonzero) digits is 12800, while the sum is 35.

The square root of 1085811245 is about 32951.6501104269. The cubic root of 1085811245 is about 1027.8224789605.

The spelling of 1085811245 in words is "one billion, eighty-five million, eight hundred eleven thousand, two hundred forty-five".