858261081 has 8 divisors (see below), whose sum is σ = 1146853984. Its totient is φ = 570921120.

The previous prime is 858261059. The next prime is 858261097. The reversal of 858261081 is 180162858.

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

It is not a de Polignac number, because 858261081 - 2⁵ = 858261049 is a prime.

It is a super-2 number, since 2×858261081² = 1473224166318577122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (858261011) 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, 311635 + ... + 314376.

It is an arithmetic number, because the mean of its divisors is an integer number (143356748).

Almost surely, 2^858261081 is an apocalyptic number.

It is an amenable number.

858261081 is a deficient number, since it is larger than the sum of its proper divisors (288592903).

858261081 is a wasteful number, since it uses less digits than its factorization.

858261081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626471.

The product of its (nonzero) digits is 30720, while the sum is 39.

The square root of 858261081 is about 29296.0932719706. The cubic root of 858261081 is about 950.3271563899.

The spelling of 858261081 in words is "eight hundred fifty-eight million, two hundred sixty-one thousand, eighty-one".