1018425085 has 4 divisors (see below), whose sum is σ = 1222110108. Its totient is φ = 814740064.

The previous prime is 1018425077. The next prime is 1018425091. The reversal of 1018425085 is 5805248101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 798288516 + 220136569 = 28254^2 + 14837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1018425085 - 2³ = 1018425077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1018425085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101842504 + ... + 101842513.

It is an arithmetic number, because the mean of its divisors is an integer number (305527527).

Almost surely, 2^1018425085 is an apocalyptic number.

It is an amenable number.

1018425085 is a deficient number, since it is larger than the sum of its proper divisors (203685023).

1018425085 is an equidigital number, since it uses as much as digits as its factorization.

1018425085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203685022.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 1018425085 is about 31912.7730697287. The cubic root of 1018425085 is about 1006.1043560151.

The spelling of 1018425085 in words is "one billion, eighteen million, four hundred twenty-five thousand, eighty-five".