1085555901 has 8 divisors (see below), whose sum is σ = 1449100224. Its totient is φ = 722857760.

The previous prime is 1085555897. The next prime is 1085555903. The reversal of 1085555901 is 1095555801.

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 1085555901 - 2² = 1085555897 is a prime.

It is a super-2 number, since 2×1085555901² = 2356863228391843602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1085555901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085555903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208545 + ... + 213686.

It is an arithmetic number, because the mean of its divisors is an integer number (181137528).

Almost surely, 2^1085555901 is an apocalyptic number.

It is an amenable number.

1085555901 is a deficient number, since it is larger than the sum of its proper divisors (363544323).

1085555901 is an equidigital number, since it uses as much as digits as its factorization.

1085555901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423091.

The product of its (nonzero) digits is 45000, while the sum is 39.

The square root of 1085555901 is about 32947.7753573743. The cubic root of 1085555901 is about 1027.7419036058.

The spelling of 1085555901 in words is "one billion, eighty-five million, five hundred fifty-five thousand, nine hundred one".