1085172599 has 4 divisors (see below), whose sum is σ = 1240197264. Its totient is φ = 930147936.

The previous prime is 1085172589. The next prime is 1085172601. The reversal of 1085172599 is 9952715801.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1085172599 - 2¹⁶ = 1085107063 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 (1085172589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77512322 + ... + 77512335.

It is an arithmetic number, because the mean of its divisors is an integer number (310049316).

Almost surely, 2^1085172599 is an apocalyptic number.

1085172599 is a deficient number, since it is larger than the sum of its proper divisors (155024665).

1085172599 is an equidigital number, since it uses as much as digits as its factorization.

1085172599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155024664.

The product of its (nonzero) digits is 226800, while the sum is 47.

The square root of 1085172599 is about 32941.9580322725. The cubic root of 1085172599 is about 1027.6209266019.

The spelling of 1085172599 in words is "one billion, eighty-five million, one hundred seventy-two thousand, five hundred ninety-nine".